It's not binary. That someone might still be a good friend, and be willing to communicate by different means for one on one conversations. But it's easy to forg

It's not binary. That someone might still be a good friend, and be willing to communicate by different means for one on one conversations. But it's easy to forget when you're setting up an event and inviting a large group, that one of your friends won't see it and you'll have to contact them individually.