There was a TV program that's called MythBusters, and I think in general, the TV station or common belief is that it can bust myths.
Some example might be, it tried to build a soda bottles propelling device and see that it failed, and cannot really propel a box 20 feet away. Or it might build 2 electro-magnetic discs and show that it cannot really help a person climb up a steel wall (as in the movies).
But can it actually bust such a myth?
That's because even a company, when they invent something, they might start with something that fail, and they may go through years and years of R&D, and after 3 years, they still may not come up with a device that work, and they may finally succeed after many years. So if MythBusters tries something for days (probably only days or a couple of weeks) and cannot succeed, can they really disprove it and call it a myth?
In this example, say, if a company, after years of research, found a way to have 2 electro-magnetic discs that have strong magnetic force enough for a person to climb up steel wall, it might be sold at a fairly high price, or it might be put on hold if the company doesn't see that it has good commercial value yet. So if MythBusters studied this for a month and can't build such discs, can it declare what is in the movie is fake and cannot be real?