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What's the dumbest thing you thought as an adult that you recently learned was wrong? (self.asklemmy)

submitted 9 months ago* (last edited 9 months ago) by cheese_greater to c/asklemmy

189 comments fedilink hide all child comments

I just realized while cooking that a measuring-cup cup (as measured out as 250mL in a glass measuring cup) is the same amount(s) as one of the actual plastic baking measuring cups that go inside each other like Russian dolls lol

I thought they were different somehow (something something imperial metric yadda yadda yaddda)

Your turn to come clean Lemmings!

**EDIT: to clarify, I mean volumetrically for measuring liquids

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[–] pandacoder 2 points 9 months ago (1 children)

You can see other people in a reflection without them being able to see you.

It is not possible to see someone else's eyes (except from the side, so it's only seeing their eyes in profile) in a reflection without them being able to see you too.

It's literally not possible via reflection, as everything is equal and opposite. If light can go from their eyes to yours, it's also possible to go the opposite direction.

This is what everyone has been saying but instead of thinking through everything clearly, you resorted to bullying.

The only way to accomplish this one-way vision is by adding something that is not reflection to the system (like a one-way window), but that's breaking the premise under which everyone else has been commenting in good faith.