Yes, off topic. I never said we knew all, hardly in fact. But certain truths exist and are known. Gravity is known. Newton’s laws are known. Find a new power source and you may get a more efficient engine, but it still must live within Newton’s laws, the laws of conservation of mass and energy, and the laws of thermodynamics. Ignorance is different than denying known facts.
“...certain truths exist and are known. Gravity is known.”
Really? What causes gravity? A particle? A wave? A field? You should publish your findings if you know this.