Apparently inky caps are completely edible – unless you drink alcohol.

Source: https://en.m.wikipedia.org/wiki/Coprinopsis_atramentaria

25 years ago I was writing a paper on AI ethics and part of it was creating a mushroom identification program using a neural Network backed, image processing and language model. The conclusion of my paper was that it was wholly unethical to suggest that AI could correctly identify mushrooms based on descriptions and pictures alone, when the price for failure is death.