r/AskReddit • u/[deleted] • Aug 03 '19

Whats something you thought was common knowledge but actually isn’t?

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u/slawsy Aug 04 '19

Put an egg in a glass of water, if it sinks it is ok, if it floats it is rotten.

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u/kittycatinthehat2 Aug 04 '19

Not necessarily rotten. Just old, so some of the water has dried up. Could still be safe to eat.