Realized that I have got in the habit of using two bits of shorthand in a work context.
"We don't care about that", meaning "the priority of that is currently low enough that we will not take action".
"I don't believe them", meaning "Although I accept that this is their current position, I think there is a reasonable chance that changing circumstances will cause them to wish to alter their position in the short to medium term, and I want to allow for this, therefore I think it is best to act as if the issue is not yet completely decided".
I realized they are not as widely understood as I thought, so I may have to stop using them. And perhaps they're not really even that useful and I just find them fun to say because I can pretend to sound like a hardass.