Ack, OK somehow I didn't even think to read the definition of and before. Now I can see how my definition is basically equivalent.
I noticed it being bound in aand before but wasn't sure why. Your example of applying prn seems useful but are there any other common similar idioms? Thanks for the reply.
Well, you can write (aand (complex-expression 'that (might return) "nil") (frobnicate it)), but I can't think of any specific examples off the top of my head. There's also aif and awhen, which do similar things, and which are probably slightly more useful.
