I am mainly inspired by C#. Ok, I can agree, that some things depends on the interpretation. You can think about several returned values as a tuple. In designing Algorithm concept, I was thinking how to decompose or deconstruct a mathematical function - to be able to operate with parameters, to transform input into output. Here You will say that it is the definition of function. Well, I went little bit further. In KatLang it is very important if you use brackets () or {}. Both brackets defines an algorithm, but () cannot hold implicit parameter. Maybe thinking from this perspective will help you see some more value in KatLang. What I wanted to say is that in KatLang I 'destroyed' or 'decomposed' mathematical function and used the parts to construct a concept that in KatLang is called an algorithm.