What's the dumbest thing you thought as an adult that you recently learned was wrong?
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
That was back when people took the administration at their word. Mah terrism held a lot of pull immediately after 911. Plus you had useful idiots like Judith Miller out there trumpeting the narrative.
But the experience cured me of that disease. And then Snowden happened to finish the job.