You've either made a grandiose error in your math or you've misinterpreted how differential equations are used. Here you are arguing that the two equations (y=(dx/dy)+a) and (y=a) are equal. Calculus is math and math is logic, and logic directly opposes that those two equations are equal. The only scenario in which these two equations would be equal is where x and y would hold the same value, and at that rate of change in satisfaction you'd be unlikely to care what anyone else says because you probably just snorted an 8 ball of coke.