Quahog,
Sorry for the delay in responing to your post.
Here goes:
If there were a neutral state between light and dark, hot and cold, then surely it would be capable of being quantified in either lumens or degrees.
From an on line dictionary:
Scientists use the units candela and lumen to measure the brightness of light as perceived by humans. These units account for the different response of the eye to light of different colors. The lumen measures the total amount of energy in the light radiated in all directions, and the candela measures the amount radiated in a particular direction. The candela was originally called the candle, and it was defined in terms of the light produced by a standard candle. It is now defined as the energy flow in a given direction of a yellow-green light with a frequency of 540 x 1012 Hz and a radiant intensity, or energy output, of 1/683 watt into the opening of a cone of one steradian. The steradian is a measure of angle in three dimensions.
The lumen can be defined in terms of a source that radiates one candela uniformly in all directions. If a sphere with a radius of one foot were centered on the light source, then one square foot of the inside surface of the sphere would be illuminated with a flux of one lumen. Flux means the rate at which light energy is falling on the surface. The illumination, or luminance, of that one square foot is defined to be one foot-candle.
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Now, do you still not believe a lumen to be a measurement of light? What about wattage? Do you not also believe a watt to be a measurement of light? Why does a 100 watt bulb give more light than a twenty light bulb? Or does it simply displace more darkness? Either way, there is a difference between light and dark.
Also, you say:
Same applies to heat. Cranking up the AC does not add cold, it removes heat.
You are exactly right. A/C does not cool the air. It removes heat and therefore makes it feel cooler.
But doesn't the removal of the heat render the air somewhere between hot and cold?
After all, cold is simply the removal of all of the heat.
Is that possible?
No.
But all heat would fry the earth.
I only propose that there is a difference between dark and light, and hot and cold. If you still don't agree, I need a more definitive explanation.
Have fun,
Phil
