has been marked as "an exact duplicate" of
Is it best practice to do this? (Granted the question actually asks two questions and should have been split up.)
We are pointing a learner to a post which is a multipart treatise on the perfect which, as much as I like it, is probably written at a level that is way over the heads of most learners here. Also, its length might be seen as daunting to many learners. Yes it's a good resource, but how much of a service is it to mark a basic question about the difference between the simple past and the present perfect as a duplicate of this treatise?
For what it's worth, I've read the canonical answer (all four or five days parts) and come away with my mind reeling.
I'm not sure we're providing learners (many of whom cannot write a single grammatical sentence) with the best practice by marking their questions as a duplicate and pointing them to this treatise. This is no longer an Ask a question, get an answer situation, but Ask a question, get pointed to something that will take you hours to read and which maybe you will understand.
I don't think this is best pedagogical practice.