Very amusing, I'm sure. Let's look at it from the other perspective. You're in a meeting with someone you want money from (and maybe someone you even respect)

Very amusing, I'm sure. Let's look at it from the other perspective. You're in a meeting with someone you want money from (and maybe someone you even respect). Your whole mindset for the meeting is that you should come across as knowledgeable and confident. He says something that confuses you. His tone of voice says "Even my grandmother knows this, if you don't you're an idiot, and my money and I are out of here". It might cross your mind that he's a VC and deals with a much broader range of the tech landscape than you, focused on your startup for the last year. You might even get as far as thinking "OS/2? I thought that was ancient, but what do I know about the enterprise field, maybe they renamed some $500,000 product as OS/2?" You have a split second to decide what to say. Do you: a) Say something that means "Sorry Mr. VC, but you are completely clueless about technology" b) Ask for clarification for a topic which doesn't really seem relevant c) Try to smooth over what to you is an awkward bump in the conversation b) seems like the optimal choice, but I couldn't really blame anyone who chooses c) in the heat of the moment. At any rate, I would be wary of anyone who chooses a).