What I meant by errant ideas are these things that are often repeated that simply aren't true. In another thread, Ouisch mentioned that American school systems have used of Warriner's. [sp??] I believe that this particular grammar saw widespread use though I may well be mistaken.
Anywoo, in another discussion, on another site, some years ago, someone posted from this grammar, the notion that the present perfect was used for actions that continued into the future.
We know that this is not the case. Perhaps, if Ouisch still has her old school books, she could look this up and post what was stated there.