this indicates that none of the modules could actually do anything with that
text, so whatever happened probably didn't fire any modules (and if it did,
they didn't provide return text anyway)
mostly for sending commands to the bot without addressing the bot with
bot: (and potentially triggering MegaHAL) yet also without exposing
sensitive commands to the non-addressable mode (like wtf/quit). speak
the alias and the bot will run the looked-up text through the modules,
regardless of their addressable settings