No scientist believes position 2 in general. Regarding particular subject matters and well-confirmed theories, on the other hand, it's pretty much uncontroversial. No cell phone would work and no plane would fly if the underlying physical theories were flat-out false.
Position 3 is probably analytically true, too. The idea that there is something that can in principle not be explained by taking a close scientific (=skeptic, methodical, experimental, precise) look at it hardly makes any sense.
No scientist believes position 2 in general. Regarding particular subject matters and well-confirmed theories, on the other hand, it's pretty much uncontroversial. No cell phone would work and no plane would fly if the underlying physical theories were flat-out false.
Position 3 is probably analytically true, too. The idea that there is something that can in principle not be explained by taking a close scientific (=skeptic, methodical, experimental, precise) look at it hardly makes any sense.