Yeah, I'm using the C nomenclature ("aliasing" vs "association") because HN commenters are broadly unfamiliar with Fortran. What I mean by "default" is that if

Yeah, I'm using the C nomenclature ("aliasing" vs "association") because HN commenters are broadly unfamiliar with Fortran. What I mean by "default" is that if I declare a function with two array arguments in Fortran, with the simplest possible syntax, the compiler assumes that they do not alias (are not associated). By contrast, if I declare a function with two pointer arguments in C, with the simplest possible syntax, the compiler assumes that they may alias (are associated in some unspecified manner). The C semantics are certainly safer, but they lead to lots of "Fortran is faster than C" blog posts by people who either don't know about or simply don't want to use the annotations.