👉 In mathematics and logic, a "hypersubtle" is a term used in mathematical analysis to refer to a function that behaves as if it were close but not exactly equal to another function. In other words, it's similar but not identical. For example, consider the function f(x) = x^2 - 4x + 3. This function has a derivative of f'(x) = 2x - 4 and a second derivative of f''(x) =