Forum:SH:Determining sentience for species

I've been wondering lately how to determine if a species is non-sentient as opposed to semi-sentient or sentient. If the species appears it is pretty clear to tell if the species is sentient, but it is harder if the species is only mentioned. Also, can you determine if a species is semi-sentient or non-sentient without the source specifically stating so? I just wanted to see what everyone else thought because it seems to be haphazardly chosen for good articles and it is even worse for comprehensive articles. I just wanted to get some opinions on how this should be handled as many articles make no reference to setience whatsoever. (not even having a Category:Species of undefined sentience)-- Exiled Jedi   (Greetings)  16:41, March 23, 2013 (UTC)