I'm thinking.. that anyone WHO claims that they have mastered any language.. definately hasn't mastered it.
Most languages change continously over time, which makes it difficult to master all parts of the language. My
is that anyone who thinks they mastered a language such as perl, has not seriously considered all the facets of the language nor realize that programming languages continually change and evolve over time. That doesn't say that one cannot master a language or
master the syntax of a language - but in order to master anything - one must keep up to date with the current changes.