> This is why understanding only the abstractions does not work. I don't think your example shows that at all: If it didn't actually explicitly say in his Fort

> This is why understanding only the abstractions does not work. I don't think your example shows that at all: If it didn't actually explicitly say in his Fortran reference manual that "The 'thing' you write between a file-open and a file-close can only be a single character", then... Sorry, but then AFAICS your example only shows that he didn't understand the abstraction that "file-open" just opens a file for writing, without specifying what to write. (Maybe he slavishly followed some example in the manual that only wrote one character?) This needless sprinkling of file-open / file-close looks a bit like he did the work of a current optimising compiler (only here it was pessimising), "unrolled a loop"... So AIUI it shows the opposite of what you set out to show: Too concrete without higher-level understanding was what did him in.