Q: Can your system do X?
A: Yes (doesn't matter what the question is, or that an entire add-on would have to be built that could never be cost justified).
Q: As a company we do things like this, will your system work?
A: Yes, our product works with your process, no matter what it is.
I have observed this to be true. Customers particularly love the second one, so telling someone that they must change their process to work with your super simple un-customizable product can often be a deal-breaker.