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Psionic Roshambo:
The problem with X party blocked X bill that would have prevented X is that yes the bill probably would have worked great, buuuttt they put XYZDCBG in said bill as an attempt to sneak things in that tend to be completely unrelated to the original bills intent. It sucks because if they would just do a single thing they could probably get something done...
This is mostly true, but the fear of the dentist is unique and more deeply rooted: it awakens atavistic, unconscious and innate fears in humans.