<Phantom_Hoover> learn composition is where you take morphisms such as Phantom and Hoover from the Pha category and combine them together: Hoover \xe2\x88\x98 Phantom.

#!/bin/sh
allquotes | if [ "$1" ]; then
    if expr "$1" + 0 >/dev/null 2>&1; then
        sed "$1q;d"
    else
        grep -P -i -- "$1"
    fi
else shuf -n 1; fi