Two questions on tags (preferably in TB7 but even in PB6 will do):
1) Is there a limit to the number of tags you can have in a Brain? If so, how many?
2) I understand the concept of a tag 'thought' which is the parent of all instances of a particular tag. However, most often I don't want to see it. I regard a tag as a bit of info I attach to a regular thought. However, it is fairly easy to inadvertently get the tag's parent thought on the plex, and I can't make it go away! I now have my plex with several tag thoughts just floating - I can push them to the side, but there must be a way of making them invisible. What is it?