This discussion happened at the breakfast table, with no reference works to hand, apropos of nothing.
Michael: Dad, the Coptic capital letter hori looks just like a backwards S. And so does the little hori. Actually, they don't have capitals.
Marcus: [scathingly] None of the hieroglyphics have capitals.
Michael: Coptic isn't heiroglyphics. There is, uh, ... demodit ...
Michael: Yeah, demotic and hieratic.
Marcus: Demotic was the one that everyone had to know.
Michael: No - it was just scribes and stuff.
[After a break to get dressed and argue a bit about other things]
Michael: Look - it says here that demotic was used for legal texts and mummy inscriptions.
Marcus: Yeah, but you smell.