Let's say for example that you ask your boss about a meeting and you find out when it is and where it is. You could let your coworkers know about it, or just believe that they are perfectly capable of asking for themselves if they want to find out. There's also a chance that they might know already.
What do you do in these cases? Just leave it alone? I don't want to look like I don't care about them by leaving out details if they don't know yet. But then again, I don't want to interrupt if they are going to do this anyway and make it look like I question their ability to find out for themselves.