Email Exchange #1:
Vendor: I wanted to ask you if you have any experience (or if you have tried) with our product?
Me: I've actually never heard of Vendor -- and I thought I was at least aware of most things out there.
Vendor: I am really surprised that you are using Competitor and have never heard of Vendor.
Me: I'm even more surprised that you believe I am using Competitor as I never mentioned any such thing.
Email Exchange #2 (This one actually happens a lot):Developer: Can you tell me how to fix this problem I'm having with Competitor O/R Mapper?Me: I obviously don't use Competitor O/R Mapper, so I have no clue -- maybe switch to mine?