<oerjan> learn print_args_or_input Is a utility command that makes it easy to create a shell script that can be used either as a pipe or directly as a HackEgo command. Use as print_args_or_input "$@" | yourShellCode . See also shebang_args_or_input.

#!/bin/bash
topic=$(echo "$1" | lowercase | sed 's/^\(an\?\|the\) //;s/s\?[:;,.!?]\? .*//')
[ -e "wisdom/$topic" ] && verb="Relearned" || verb="Learned"
echo "$1" >"$(echo-p "wisdom/$topic")"
echo "$verb '$topic': $1"