I'm always a little skeptical of brand new claims that the popular media jumps on too quickly. It's good to let the bigger discoveries percolate for a few years so that the natural vetting process in science can filter out the inaccurate theories.
I'm still not sure what to think of that "hobbit" fossil, so I think of these things as possible theories until they begin to gain substantial cross referenced backing and general acceptance. For example, the broad theory of evolution which boasts overwhelming cross referenced corroboration and mainstream acceptance would fall into the "proven" category, rather than the "possible" category.
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