They sure are! And each time we are told that this is the last time. Each time we are told that such and such a bone is definite, certain proof of some marvelous evolutionist facts. And then, when no one is looking, when the cameras and the newspapermen are away, in the middle of the night, the bones are revived into another totally different species. Thanks for proving my point (not that it needed any further proof) that paleontology is a joke.
gore3000: They sure are! And each time we are told that this is the last time.
Nah! There's never a last time. But, when you get to where No-Kin untangles the mystery of why an evo would say there are no mamms on a dino, you'll note the tree of life figures heavily in the argument.
Biologists make trees of relationship all the time, argue over them, revise them. But "common descent with modification" means there's a real tree out there. You might need a time machine to get it absolutely positively right, but it's out there. It's like your own geneology. In fact, it is your rather extended geneology.
You might not know your geneology beyond who your great-great grandfather was, but it extends back into the mists of time. I mean, you know that great-great grandfather of yours had a father and mother. You just don't know who they were.
When you try to uncover more data (visiting graveyards and county courthouses, using web search tools, etc.) you start to extend your knowledge.
But you also keep having to revise, as you start to get contradictory data from different sources. You get ambiguous data that leaves exact relationships unclear.
You realize that your tree is imperfect both in how far back it goes and in its level of detail, especially as you go farther back. Your tree will never be perfect in your lifetime, cannot ever be perfect with the data preservation that exists, but if you work at it you can still improve your knowledge.