On Mon, 26 Nov 2018 06:15:17 +1100, cantankerous trolling geezer Rot Speed,
the auto-contradicting senile sociopath, blabbered, again:

I fit a lot more detectors than required for one simple reason.
Whatever room/area a fire starts in, if there's a detector in
there it's going to alarm much sooner than if there isn't.
And time is critical to survival.

Not necessarily.

ROTFLOL You just HAD to contradict again, eh, you abnormal senile idiot?

--
Kerr-Mudd,John addressing senile Rot:
"Auto-contradictor Rod is back! (in the KF)"
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