Redemption, perhaps?
Math is unprovable in that everything is unprovable; disproof is readily attainable, but only based on the foundations, such as the reflexive property. Definitions are also always correct, because it isn't possible for them to be anything else. So P=P, three noncolinear points are a plane, etc...
'Common Sense' is either science or ignorance. There isn't any overbeing separating the two. Either you sort things out to the best of your ability and based on all data available, or stop talking. If the Earth is accelerating upward, it means there must be Work done. Work introduced by nothing. Since Work=Change in Kinetic Energy, Energy is added to a closed system (the universe). Every other possibly conceivable test done ever in a closed system reaffirms the Law of Conservation of Matter and Energy. That would mean that there is an unexplained exception to the most fundamental law of Thermodynamics; due to Occam's Razor (proved as well as the aforementioned, or axiomatic if you like), as all other things being equal, it is more likely that there is no exception and there is no Flat Earth.