Not true. Incorrectly cooked kidney beans (and to a lesser degree other beans) can cause severe vomiting and diarrhea, because of phytohaemagglutinin toxicity,

Not true. Incorrectly cooked kidney beans (and to a lesser degree other beans) can cause severe vomiting and diarrhea, because of phytohaemagglutinin toxicity, which needs prolonged heating to destroy: https://en.wikipedia.org/wiki/Phaseolus_vulgaris#Toxicity https://en.wikipedia.org/wiki/Phaseolus_vulgaris#Toxicity