[vickychijwani]

> (a) an argument helping my thesis by showing that you can program functional languages quite well by using mutable recourses

Let me preface this by revealing that I'm neither a functional programmer, nor am I convinced that functional programming or immutability is any sort of silver bullet.

Your original thesis was that "a data structure cannot be functional," which you later defended by saying "git is only immutable on the meta level, its implementation uses mutable files", which, while being 100% true, is also true of the category of programming languages we call "functional" as they rely on mutable RAM. That is what the GP has been trying to explain to you, but your obvious hate for anything labelled "functional" makes you blind to all this.

Sorry mate, you just have to concede the point here. This is not a discussion about whether functional programming is any good, which is what you seem to be treating it as.