The verbs aren't choosen at random. They are almost all a write-word (write, set, create, put, save, update, dump, clear, reset, print, append, ...) or a read-word (read, get, ensure, load, check, ...). But the verbs you list doesn't fall into either category. Think of what it would mean to command someone to "believe!" it doesn't make sense (to a non-sentient entity anyways!). "print!" otoh, is perfectly understandable.