Firemorphic
Activist Membrane
Some interesting references.
My understanding is that only the Quran is the authoritative Word of God. Hadiths are stories and as you may know millions of them have been proven to be fakes and fraudulent.
So the way we can distinguish the true hadiths from the false ones is by comparing them to what is revealed by God in the Quran.
If the Hadith supports the text of the Quran good and well, but if it conflicts with the Word of God it is nothing but a fabrication.
The standard as far as I’m concerned is the Quran by which truth can be distinguished from falsehood.
No offense but if you honestly follow that logic all the way, then it automatically disproves your own religion - which steams from a "fulfilled" prophecy from a mystical eschatological sect (Bayani/Babism) from within Twelver Shi'ism, which follows a different logic to what you're saying in regards to the Qur'an and the prophet......because Hadith are necessary in the first place for such a mystical sect to emerge in the first place. As a Shi'i, I obviously don't think it's a bad thing, well, at least in reference to the Prophet, Imams and Bab himself.
Hadiths are primarily evaluated by their lineage and spread, it depends how close we can tie it (through a tree of references) back to the person who said it, it's a form of scientific method based on a saying's traceablity (and yes, there is obvious contention between Shi'i and Sunnis on the results of this).