The dilemma? I'm completely hopeless when it comes to "... the different branches of Arithmetic - Ambition, Distraction, Uglification and Derision... " (Lewis Carroll). Nevertheless I sometimes get a vague idea what it is all about. Take the strangely beautiful Fibonacci series. Only recently I gushed about them to some friends and then couldn't explain what they are all about. Now I'll only have to refer them to this wonderful (flash) site, which I found here.
Gentleman in red MAGA cap disrupts flight
7 minutes ago