Ben Folds, from the song “Bastard” on Songs for Silverman:

“Why you got to act like you know when you don’t know?”

How many of us are afraid to admit to a client that we, “just don’t know” the answer?  Ben Folds would suggest:

 “It’s OK if you don’t know everything.” 

It really is.  Next time you don’t know, say you don’t know.  Your clients may appreciate your candor.