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holy guacamole said..OK, So is gravity questionable, or real?
What about F = ma? Is that in question?
Laws of Thermodynamics? Shall we throw those out and go back to shamanism?
Apples and oranges. You're making an argument from authority about a complex collection of systems and backstopping it with simple science.
Science is a way to understand things, not the final destination.
There are still many, many things we are learning about gravity, Newton's laws of motion, thermodynamics and the rest of it.
People questions science all the time, because that's good science.
And yes, questionable. It was in fact questioned, even though "the science was settled" and we were brought to a new and deeper understanding of gravity and Newton's laws of motion by Einstein and Relativity.
Newton's Second law (that you quoted there) is an approximation and increasingly fails at higher relativistic speeds, for example.
Any good scientist would say that the laws of thermodynamics have served us well -- so far ... and yet remain open-minded to investigating claims that they've been falsified. Like, the Third Law and black holes.
Falsifiability -- that's science. Claiming that you can't argue, investigate or even question something is not science, it's dogma.
Oh, snap.