
Debunk this: monkeys can be trapped with a nut inside a jar.
The idea is metaphorically rich: you can put a nut in a jar with a narrow aperture and the monkey will find the nut and stick their hand into the jar to grab the nut. They find that with their hand wrapped around the nut they cannot extract their hand from the jar so they stay stuck with their hand around the nut in the jar, unwilling to let go of their new treat.
I see this story over a lot of the internet and many people claim that it is true. I haven't seen anyone claim it isn't true but I also don't see any videos of a monkey being caught in this way. Nor have I yet found a reliable source of it being used to catch monkeys in the wild. Can we prove or disprove this story?
https://www.econlib.org/archives/2018/03/inside_the_monk.html