If they knew ahead of time what the crow would do, it's a demonstration. If they didn't know how it would behave, it's an experiment.
I'd say it's pretty likely they observed that crows had some kind of understanding of water displacement, and came up with a bunch of tests to see how far they could take it.
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u/zalvernaz Dec 18 '19
Oh God. I thought people were dumb just from reading this sub, but this takes the cake.