If ignorance is bliss, then, the cure for ignorance is in opposition to bliss. This may explain why so many left-leaning people get instantly enraged when faced with facts that Trump is a great president and just what we needed(America AND world) right now.
Another FE posit that can be trashed is the curvature of the earth not accounting for how far you can see over water. Water assumes the limits of its container. It does not bulge out. FE "proofs" using water make me cry a little from laughing so hard.