I use it whenever I feel the need to say or explain something, but I'm 90% sure the listener already knows it. Failing to say could lead to a failure at a crit

I use it whenever I feel the need to say or explain something, but I'm 90% sure the listener already knows it. Failing to say could lead to a failure at a critical time, but explaining it like they're a simpleton could lead to them being upset about that. So I soften it with 'obviously'. But this almost always needs to be someone I have report with. Without knowing the listener, I can't really judge what they'd know or not. And on the web, it's probably not time-sensitive at all, and it's a lot easier to skim the explanation.