[Will's going to remain mum's the word on the first part. It might be hot in the shop and his day before might have been crappy, but there's no need to really get into an argument. He's probably already being grouchy enough.]

Are you open to the real answer being the one you don't want it to be? [Acceptance is the first step, wasn't that what Will had said? Going into something without accepting the answer could be the last one wanted...] All the evidence in your face that it can't be done, would you accept that?