Demarcation Dilemma

The Demarcation Dilemma (PDF) explores how we define natural science, that is, how we distinguish between science and non-science. It does not deal with the question of how we distinguish between good science and poor science, or between good anything versus poor anything. This is a handout I developed many years ago, recently updated for my spring online course, where it supplements the lecture on “Language and Reality.” That lecture defends the idea of many sciences (scientia, Wissenschaft), each defined by their epistemic status (knowledge) relative to opinion. This handout critiques the alternative idea that there is one universal scientific method regardless of the specific area of science involved. The next lecture, “Knowing kata-physin,” picks up where this leaves off with a broader discussion of scientific methodology across the various disciplines with their distinctive problems and subjects of inquiry.

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Covid-19 Blessing

Watch this often. Feel God’s love for you. Pray it for those you love. This is the church as it really is, extending love, peace and comfort to the world:

Words from Numbers 6:22-26. Go to youTube to read the list of participants and the comments. My thanks to all who came together to create this inspiring blessing to sustain us in this time. It is a blessing from the UK for the whole world.

Download audio version.


My other favorite versions:

Look for others… feel the Spirit moving through his people around the world.


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Shape of the Earth II

My thanks go to Chuck Rice, president of the OKC Astro Club, for inviting me to present a program for the monthly meeting this coming Friday. This video addresses:

When did people discover that the Earth is round? Was their evidence for the spherical Earth convincing? If you were to find yourself in some remote location where people did not know the shape of the Earth, would you be able to point them to evidence accessible to them that would prove the Earth is round?

Download a PDF with the slides and script.

Update: I pre-recorded this video for virtual sharing due to the pandemic. The meeting was held at youTube live. Danny MacDonald worked some amazing technical magic to interweave Chuck and me in a Zoom chat session, with the pre-recorded presentation, to create the blended youTube live video. Wow! The blended video with Q&A is at youTube (OKCAC members only; access via Club forums). The pre-recorded portion is here.


This is the second time I have made a video on this topic. The first – posted here – is presented in dramatic form. Its cheesy humor definitely makes it more entertaining, but it is of low resolution.


Flammarion woodcutWant to download an image of the “Boldly Explore” Flammarion image, to make a print or to design a mug or t-shirt? Links for jpg or tiff are here: Woodcut colorized by Susanna Joy Magruder; also at Lynx Open Ed.

At Lynx Open Ed:

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Where else but in a library?

“But in a library, you can count yourself as king of infinite space. You can find a spell for the refreshment of the spirit in every story you read, and every story can be something you live. There’s one sense in which all of these individual books are, as it were, like little portals through which you can travel into another world, and have a great freedom, much greater than the one your government allows you, because you’re not allowed to go outside. And that’s a consolation…” – Malcolm Guite

During this pandemic, thanks to Malcolm Guite for inviting us to drop into his study for personal conversations like this one! In it we revisit Voyage of the Dawn Treader by C. S. Lewis.

If you like that one, don’t miss the conversation that preceded it:

Enjoy other visits to Malcolm’s study at youTube. Say yes when he invites you to tea.

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Anthem – Is He Worthy?

To my daughters: This is how we see you. Not just in the past, but even now and in the future. Our joy in you is just the start. Each of you, just by being you, even now, no matter how you feel or what you do, create this song of praise, now and forevermore, in the eyes of Abba, the Son, and the Helper-Comforter, who love you and delight in you. This is you through their eyes.

“Yahweh your God is in your midst, a Victorious Warrior who is mighty to save. He will rejoice over you with songs of joy. He will renew you by his love. He will dance with shouts of joy over you, as on a day of festival.” Zephaniah 3:17–18


Video by Chris Kramer. Written by Andrew Peterson. Arrangement from Chris Tomlin.

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Early Earth Science Controversies: Mass Extinctions and Ice Ages

Last Thursday night I presented a public talk to kick off a new year-long series to promote scientific literacy. See the coverage on the front page of the Norman Transcript. It’s a joy to participate in an event with area educators. They got the word out and the auditorium was a full house. After maximum capacity was reached, more than 40 cars, I’m informed, were turned away before they could even park.

Sam Noble Museum auditorium, Rudwick presentation

I recorded this video at home on the Saturday after the event, with extra slides that make it 7 minutes longer (but maybe easier to follow). Download the slides/script (PDF).

Early Earth Science Controversies: Mass Extinctions and Ice Ages from Kerry Magruder on Vimeo.

Questions for discussion:

  1. What is meant by the following conceptions of the Earth’s past? How do they differ from each other? What discoveries, and the work of which scientists, are associated with each?
    • Steady state
    • Cyclical
    • Directionalist Synthesis
      • Developmental views
      • Geohistory (contingent history)
  2. Why does Rudwick argue that the terms “catastrophism” and “uniformitarianism” are limited and often misleading?
  3. Why does Rudwick argue that geohistory was a “radically new” discovery for science circa 1800?
  4. Which of the historical figures mentioned would you like to learn more about?
  5. Which of the historical books mentioned would you like to see for yourself?
  6. Some people today are skeptical of the results of the historical sciences (e.g., the age of the Earth, climate change, etc.). Are the conclusions of the historical sciences reliable and warranted? How would you engage a friend in conversation on this question?
  7. Which work of Martin Rudwick’s might you wish to read next?

From the Norman Transcript, by Emma Keith:

“Science: The Cutting Edge” will explore misunderstood or somewhat controversial subjects through four lectures this spring and four in the fall, each free and open to the public. Spring topics will include ice ages and extinctions, dark matter and energy, climate change and evolution.

Each of the lectures will take place at 7 p.m. at the Sam Noble Museum of Natural History on OU’s campus, and, weather permitting, will be followed by star gazing in the museum parking lot. The first lecture will feature Kerry Magruder, associate professor of the history of science at OU, speaking on “Early Theories of Ice Ages & Mass Extinctions” on Jan. 30.

“This gives people a chance to communicate with the experts and figure out: How do we know what we know? How does a scientific theory get developed? It’s not opinion, it’s based on evidence, and I think these speakers are going to speak to those kinds of topics,” said Eileen Grzybowski, an AP biology & astronomy teacher at Norman North and one of the series organizers…”

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My address in the Universe

Years ago I created an activity on the grandeur of the universe which parents could complete with their children. It was ideal for those long nights waiting up for an eclipse or meteor shower. It could be used at a star party, in homeschool astronomy, or for worship. Our daughters may still have their completed copies in their Astronomy school notebooks!

The original file was in an obsolete AppleWorks format. Today I recovered the text and re-created it. Back in the pre-Internet days, the original version supplied photographs and asked for hand-drawn pictures. Now, with pictures so easily available online, I’ve left most pages blank so that parents and children can search online together, or choose to draw in objects by hand, as they wish.

At the end are scriptures and historical quotations that may prompt discussion of the grandeur and almighty love of the God who cannot be contained by the universe, yet chose to come among us and be with us forever. The immensity of the universe, theologically speaking, is not a modern discovery, but a modern exploration of an ancient wonder.

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The old king


Georges Rouault, The Old King (1937);
Carnegie Museum of Art, Pittsburgh Pennsylvania

What a dignity (almost obscure) the old king has. We overlook the flowers in his hand.

His sympathy runs deep, for he has long battled the darkness within and the evil of the world without. Yet we see him now as through the glass of an old cathedral window. Light (almost hidden) illumines him outward from deep within, arising from beneath the surface and from beyond the world.

He seems timeless, an archetype of this age. We are all hidden kings, between the times, suspended between the Advents of the eternal King.

This is what I have learned from contemplating “The Old King” for 40 years. A color print has hung on my wall, wherever I have lived or worked, ever since I wrote a now-lost paper on Rouault for an art history class c. 1980.


The modern painter who has shaped my journey the most is Michael Barfield, a soulmate of Rouault. Consider Michael’s visual reflection on the significance of flowers:

Michael Barfield, Permanence and Transcience
Michael Barfield, “Permanence and Transcience”

Michael commented on an earlier version of this post:

Michael Barfield, flowers


Rouault’s larger body of work portrays the dignity of outcasts, transients, the dispossessed, the marginalized and the overlooked. The old king has a solidarity with them; he holds on to the flowers. He does not despise fragile human beings or consider their worth as manifest in their worldly station.

Georges Rouault, Christ in the Suburbs
Georges Rouault, “Christ in the Suburbs” (1920-24);
Bridgestone Museum of Art, Tokyo, Japan

Rouault’s “Christ in the Suburbs” expresses the same message I recently found so compelling in the photography exhibit, The Road I Call Home. In Rouault’s paintings of marginalized people, as in Randy Bacon’s photographs of homeless people, we discern portraits of Jesus.

“Rouault was able to see these dreary figures without pity or despair because he saw beyond the surface of things. These lonely figures were part of a larger story; he was able to look into their suffering and see Jesus. In many ways Rouault’s religious faith consisted of a life-long meditation on the incarnation of Christ. What gave him hope was the presence of Christ…” – William Dyrness

I like to think of the old king as Rouault himself, sympathetic, viewing others as participating in the suffering of Christ, as rightful but dispossessed royalty.


Or perhaps the old king is Pascal, who affirmed the dignity of humanity as dispossessed royalty in Pensées (113–117):

Man’s greatness comes from knowing he is wretched: a tree does not know it is wretched. Thus it is wretched to know that one is wretched, but there is greatness in knowing one is wretched.

All these examples of wretchedness prove his greatness. It is the wretchedness of a great lord, the wretchedness of a dispossessed king.

Man’s greatness is so obvious that it can even be deduced from his wretchedness, for what is nature in animals we call wretchedness in man, thus recognizing that, if his nature is today like that of the animals, he must have fallen from some better state which was once his own.

Who indeed would think himself unhappy not to be king except one who had been dispossessed? Did anyone think Paulus Emilius was unhappy not to be consul? On the contrary, everyone thought he was happy to have been so once, because the office was not meant to be permanent. But people thought Perseus so unhappy at finding himself no longer king, because that was meant to be a permanent office, that they were surprised that he could bear to go on living.


See Wikipedia, s.v. “Georges Rouault“; my previous post “Why?“; a short article by Heather King; William A. Dyrness, “Seeing Through the Darkness: Georges Rouault’s Vision of Christ,” Image Journal; and William A. Dyrness, Rouault: A Vision of Suffering and Salvation (Grand Rapids, Michigan: William B. Eerdmans, 1971).


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Torrance Oral History Project

One of the most exciting professional developments of 2019 for me has been the privilege of initiating the “Thomas F. and James B. Torrance Oral History Project” under the auspices of Grace Communion Seminary and the Thomas F. Torrance Theological Fellowship. Click the link for more information, including a list of participants already interviewed. Their stories are unexpectedly varied, richly detailed, and individually compelling. I hope to complete these initial oral histories and begin posting audio recordings and PDF transcriptions before the end of summer 2020.

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Love and the Cosmos: Trinitarian Perspectives on Science

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Galileo and Medicine: A Culture of Innovation

Galileo and a Culture of Interdisciplinary Innovation
Download slides (PDF)

A. T. Still University (ATSU) is the founding school of Osteopathic Medicine. They host an annual Interdisciplinary Biomedical Research Symposium (program). I’m grateful to Dr. Brian Degenhardt, director of the A.T. Still Research Institute, for inviting me to present the Neil J. Sargentini Memorial Keynote Address at this year’s symposium on Saturday, November 2. My title is “Galileo and a Culture of Interdisciplinary Innovation.”

To watch a video, go to the A. T. Still youTube channel and find the 11th annual IBRS video. This video contains the morning sessions. My talk begins at about 2 hours, 51 minutes. It is best understood in context with the biomedical research presentations which express the mission and nature of the A. T. Still Research Institute. However, I have excerpted it from that session video, and make it available on its own below.

Galileo and medicine from Kerry Magruder on Vimeo.

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The Road I Call Home

Candace and I enjoy visiting art museums when we travel, so we were delighted when we discovered that the Springfield Art Museum was hosting one of the sessions of the annual meeting for the Missouri Association of Museums and Archives.

When we entered their large rotating exhibit hall, we were stunned by the featured exhibit: “The Road I Call Home,” by Springfield-based photographer Randy Bacon. This exhibit featuring photograph portraits of homeless persons is moving and compelling in the most humane way. With artful lighting that captures warmth and detail in each face, the photographs reveal the beauty, mystery, integrity and humanity of each person. Photos are accompanied by verbal narratives, as each homeless person relays his or her own story. Portraits and narratives are mutually-reinforcing, creating an interplay of meaning that places the visitor in dialogue with each individual; one may not casually assume the role of a distant observer. The larger-than-life size of the portraits establishes that dialogue on an equal footing. Nor is there an aisle allowing one to walk straight through the hall, casting one’s eyes aside. It is impossible to avoid them. They are anything but invisible. Their humanity is manifest.

I would have wished to buy a large coffee-table book of the exhibit. Better yet, to take a field trip for my entire church and ask everyone to go inside the exhibit, as if it were the Sunday-morning sanctuary. Without any knowledge of the exhibit, to ask them: “Can you find the portraits of Jesus inside?” His real presence shines forth from every photograph (Matthew 25:31-46).

This exhibit is open until February 23, 2020. Go and see it if you possibly can. Even if you have to make it an overnight trip, you will be glad you did.

Randy Bacon,

Randy Bacon,

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