“A scientific law must be 100% correct. Failure to meet only one challenge proves the law is wrong
I started floating off the ground when Newton’s theory on gravity were proved to be incomplete.”
Gravity didn’t fail to meet a challenge. Although the anomalous acceleration of the Pioneer spacecraft indicates our understanding may need some adjustment.
Oh yes it did. General relativity works in certain situations where Newtonian gravity doesn't (although it's perfectly adequate for everyday use).