Have you ever found your team or group in a situation where you had to make a complex decision? Maybe you came to an impasse, unable to decide between two or more options, or maybe you selected one and still doubted whether you had evaluated all possible pros and cons. Well, what if I told you that there's a way to easily use a little math and psychology to organize and rank your options to determine the best solution? 

Over the years I have seen several approaches for validating inputs (@RequestParam, @RequestBody, etc.) for REST endpoints. Many of these approaches are pretty manual and require explicitly calling a validation mechanism. But is there a way to automate this process while writing as little code as possible, still validating all inputs, and responding with friendly messages to consumers?