Neil deGrasse Tyson @neiltyson
If you watched the glass long enough (over days) you will see the level slowly drop as the water evaporates from its surface. That counts as half-empty. — PolitiTweet.org
Gotcha_Juicy_217 @DJuice217
@neiltyson What if you stumble upon a glass that is at the halfway point with no evidence pointing to the direction of water flow?
