Read it as an indefinite enumeration: read the first comma as an inclusive and, then ignore the second comma.

> stop me saying things like 'Terminator is a good film and is 2 hours long'

can't you say

>x is y and z,

do you need the second is?

> E-Prime uses the English language prescriptively.

there, now even the prescription is mentioned in a prescription. How recursive, init?