> Doesn't the part parenthesised in commas have a kind of implicit 'is'?
The part between the commas, I think, is called a subjunctive clause. Does it really break the "rules" of E'? The sentence still contains a verb, so it doesn't look like a loop-hole to me.
Yes, you're correct - loop holes don't break the rules. I conflated those two concepts. I meant to just ponder whether that clause is a loop hole or an intentionally allowed construct.
The part between the commas, I think, is called a subjunctive clause. Does it really break the "rules" of E'? The sentence still contains a verb, so it doesn't look like a loop-hole to me.