as in that wonderful sf writer Joe Priestly

I was thinking more of that great skiffy writer, J. J. Becher (link). He was also a conlanger, viz. Character pro notitia linguarum universali.

You and I have differing opinions about when science fiction began as a genre. I trace it back at least to Lucian's True History (2nd century CE, Αληθη Διηγηματα). A wee bit before Azimov's time.

Ceci n'est pas un seing.