looking to get NICET certification in Fire systems for my job. I live in colorado….i can go to school nights and weekends but i normaly work a 9-5 M-F

Consider an example:

If an intruder is detected, the alarm goes off.
The alarm does not go off.
Therefore, no intruder is detected.

The alarm may not go off because of a malfunction even though the intruder is detected.

This "modus tollens" seems to be a "Denying the antecedent" instead of a "modus tollen".

http://en.wikipedia.org/wiki/Modus_tollens

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This is a demonstration of my 100% homemade fire alarm system. All it is is a homemade panel connected to three speakers, which produce a code-3 noise which sounds similar to a Wheelock MIZ-24S-R. I made the pull station using the popular building toy called K’nex. I screwed a wall switch to a plate, and created a mechanism which pulls the toggle on the switch down, into the “on” position, sounding the alarm. The pull station is simple to reset, although I had trouble with it, because I just could not get a good grip on it for some reason. But I managed, as you can see. It’s all taped because it’s only a prototype and once I get real horn/strobes and pull stations, they will all be replaced and it will all look nicer. Also, when I say, “Before it gets on my nerves”, i was actually referring to mom, who said “Stop! that’s getting on my nerves!” at some point… UPDATE: The system has been removed.

its for science i need ASAP please and thank you:D

recently installed elaborate AAS 500 digital wireless alarm system with enhancements > All hardware is good quality, functions well . . . . But , I cannot find a central monitoring station that has ever even heard of " AAS " as a manufacturer only a model designator . Who manufacturers the AAS control panel ?