Namely, it has ``` /bin/echo || exit 0 # This test requires /bin/echo to exist ``` however, it is not guaranteed that this binary will be exactly at `/bin/echo` on all systems. For example it isn’t on mine: ```fish which echo # /run/current-system/sw/bin/echo ls /bin/ | grep echo; or echo "echo is not in /bin/" # echo is not in /bin/ ```