Dear Moti, thank you for this idea. I used it in my first class of Philosophy of Science. You can see the resulting word cloud on my blog (original in Dutch; machine-translated to English). (Spoiler: the result looks quite different, except for the prominent position of the word "experiment".)
You're welcome, Sylvia! I'm glad that you have found this idea useful for your own class. And thanks for sharing your results, too. The differences are quite interesting. Do you have any thoughts about that?
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