Sure, it's easy to check ((sqrt(x-3)+1)/(x/8)) is less than 4. Now do it without calculus. Very much like this effect https://www.reddit.com/r/opticalillusions

Sure, it's easy to check ((sqrt(x-3)+1)/(x/8)) is less than 4. Now do it without calculus. Very much like this effect https://www.reddit.com/r/opticalillusions/comments/1cedtcp/stop_the_video_and_the_object_will_disappear/ https://www.reddit.com/r/opticalillusions/comments/1cedtcp/s... . Shouldn't hide complexity under a truth value.