<prooftechnique> learn prooftechnique n\xc3\xa9 NihilistDandy: He was there some time ago. Maybe he\'ll come back. Maybe he\'s a nihilist, too. (Note from the Editor: He came back, and is a nihilist.)

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