Example gratia, last statement is approximately equivalent to "I guess computer science is infeasible."
But it is not; the fact that Debian UNIX running programming languages of the sort that are used today exist proves that we have already managed a significant amount of complexity; compare to infite-size ENIAC for programming. You would certainly want to use the Debian than be stuck with latter given that you could magically NOT to implement the existing systems for it—had to write your whole program from scratch either on the tape or the Debian system.
There are many other layers of issues and problems with the comment, but understand that no matter how intellectually honest and kind you are, you cannot reply to every person who is wrong saying it & telling WHY. Often the "you are wrong" may be more valuable—mutually. I do not want to argue about this though.
