"I learned in Kindergarten that emperor penguins were the same height as us, (true at the time), but as I grew, I still thought that they were still the same height as I am. Then, as a teenager, I was surprised when I saw penguins at the zoo that they were only 3-4 feet or so, and not my actual height."
My coworker had a philosophy "professor" in community college who pronounced René Descartes as "Re-nee Dess-CAR-tess." He thought I was lying, because "why would (the "professor") not know?"