A lesson I've learned over time is that it's incredibly common for people within a company to have very different mental models of what different terms mean - especially if they work in different teams or departments, but sometimes even people the same team.

My favourite examples are things like "what is a user?" - the marketing department may be counting leads generated, engineers are thinking about records in a database table, some other team may think of users as company or group accounts.

This holds true for all kinds of other things too. You might have a project called "the login optimization project" and find that some people think it's about page load performance while others think it's about increased conversions.

For this reason, I'm always ready to ask the stupid questions.