pozorvlak | I am sorely tempted to use this picture next time I teach real analysis or logic

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See the thread here for some idea why. I especially like

citizen905's comment.

This photo, naturally, comes courtesy of

jwz. What, you mean you haven't subscribed to his blog yet?

Caching, I think. If you'd reloaded, the picture should have disappeared. This was why I didn't spot the problem when I wrote the post.