OK, say I. Let it. Doesn’t bother me.
“If x + y = 7, . . .”
. . . which is as likely or unlikely as x + y equalling 6 or 8, and furthermore is assuming facts not in evidence . . .
“then what is y?”
What, indeed?
Why drag y into this at all?
If you’re able to assume the godlike power to deem that x has a certain value — out of infinite possibilities — why, then, can’t I do the same for y? Let someone else reconcile the discrepancy in the equation. We’ve both made our cases, and I say they stand on equal ground.

God says Y has a specific value. Believe or roast in Hell you sinner!
I never told x it couldn’t =1.5.