In the interest of full disclosure, here is the same trinity for my beloved #Perl.

Tabs (and any string that can’t be read as a number) are *numerically* equal to 0 and "0" because they don’t have any value in numeric context. If you want string equality or inequality, use eq or ne, respectively: https://perldoc.perl.org/perlop#Equality-Operators

(Boolean context is a separate thing, which is why most defined, non-empty and non-zero values are considered “true.”)

@mjgardner

So symmetrical, yet so insane.

I wonder why mathematicians haven't picked up enochian glyphs yet.

@cstross
@mjgardner

@mjgardner

If we could make a rock-paper-scissors version of that graph, which way would the arrows run?

@mjgardner

The Javascript people were playing hooky when equivalence relations were taught in second year discrete mathematics.

If [] == 0 is true, and 0 == "\t" is true, but [] == "\t" is not true, the == operator isn't a form of equivalence. It is missing the transitive property.