That same nugget was in The Pragmatic Programmer which I recently have been reading. In regards to estimates or questions about things you don't know, if you ca

That same nugget was in The Pragmatic Programmer which I recently have been reading. In regards to estimates or questions about things you don't know, if you can't give a good answer on the spot the second best answer is "Let me get back to you.". The bad answer or estimate will just cause pain for your team/org.