I remember another thread went off-topic and there were a few posts on this subject, but I'd like to try and discover whether or not I use them, once and for all. I suspect I do, but I don't know for sure. My basic understanding is that if the sentence separates other whole sentences by a comma, then it's a splice. We got to the top of the long hill, we were very tired. Comma-splice, yes? But what about this, taken from a book I'm currently reading: The good old days, the fat days, page upon page of manuscript; prosperous days, something to say, the story of Vera Rivken, and the pages mounted and I was happy. Fabulous days, the rent paid, still fifty dollars in my wallet, nothing to do all day and night but write and think of writing; ah, such sweet days, to see it grow, to worry for it, myself, my book, my words, maybe important, maybe timeless, but mine nonetheless, the indomitable Arturo Bandini, already deep into his first novel. Are these comma-splices?