because it's all you see.
What I'm trying to say is that when we think something supports what someone has said, then this thing or idea exemplifies the point they are making in some way: either directly because of its qualities and features, or indirectly (or tangentially) by proving a related point - for instance if…
I'll have time to get around to all of that.
There are so many things I need to worry about right now, but at the moment it's my tea-sy situation and how long it has been cold for! It seems like a really good question for philosophical discussions, but there are other things to worry about…