Yes, but also both. (a simple example follows)

Think of it like you being at work or home. If I check your house, either you’re there, or you aren’t. If you’re there you’re at home, simple. If not at home you’re at work.

Same with your work: either you’re there when I check, or you aren’t, therefore at home.

But before I check either location (it’s understood that you are only in 1 of those 2 places), you are effectively in both places or not at all.