<shachaf> le/rn the reals/The reals are a complete ordered Brazilian currency invented by Taneb in 1994. They are universally useful in homotopy.

#!/bin/sh
topic=$(echo "$1" | tr A-Z a-z)
[ -e "wisdom/$topic" ] || { echo "$1? ¯\(°_o)/¯"; exit 1; }
cat "wisdom/$topic"