Using the definition of the derivative find at which points the function f(z) = Im(z)/z conjugate is complex differentiable.
I know that it is not complex differentiable anywhere but I need to show it using the definition and not the Cauchy Riemann equations.
I am not entirely sure what you mean when you say that we invented time to explain change. If your friend agrees that change occurs and that we perceive change, he must agree that time is real as this is the only way we could perceive change. Without time Kant argues that change would many times...