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While you are correct in that ^ is the exclusive-or operator, your summary of what the code does is incorrect. The expression in the grandparent actually does 2 XOR (3 - 1) since subtraction has higher precedence than bitwise exclusive or.

In this example, one could easily overlook this since both the correct and incorrect ways of interpreting it yield zero.

It takes 26 lbs. of corn to make a gallon of ethanol, with the benefit that we're only using solar energy that would have hit the earth in the same year, and not adding net carbon dioxide to the earth, as burning stuff out of the ground does.
It takes a lot of energy to produce ethanol. Either you're burning fossil fuels (increasing net CO2 emissions), or you're burning a lot of your potential ethanol. Did you actually read the article you linked to three posts up?

"According to the research from Cornell, you need about 140 gallons (530 liters) of fossil fuel to plant, grow and harvest an acre of corn."

So the acre of corn which produces 328 gallons (1241 liters) of ethanol requires burning 530 liters of gasoline (or 795 liters of ethanol) just to grow the corn. There goes 64% of your energy right there. By the time you factor in energy spent to distill, transport, and sell the ethanol, I would not be surprised if the whole exercise ended up as a net loss of energy.

Ethanol as a motor fuel is a crock. In the long run, we need practical fusion or orbital solar stations and electric or hydrogen-powered transportation, and in the short run, thermal depolymerization is a better process for turning organic stuff into fuel.

oops, forgot this

Btw, did you know that the US is one of the few countries in the world where a lie detector test is court admissable?

This smells of bullshit. So I googled and found.

This
And This

I've found that they almost never admitted into court, and certainly no case was made on just polygraphs tests.

The 1/3 phase thing makes no sense because AC power is transmitted as "three phase power". Instead of one cycle of AC power being sent over the lines, three different cycles are sent each 1/3 of a cycle seperate from each other. That means that converting "East Coast" power to "West Coast" power is trivial. (Besides who says the phases need to be synced at all?) So saying that they'd need to be converted to DC and then reconverted back to AC makes me doubt your statement even more. Look here to find out how power transmission really works.

How Stuff Works puts the number at 60kwh per gallon before it goes to the engine and loses most of it.

so Little time
so much to do
what does it all mean

Surprisingly, toner is not dry ink.
You should really check this out.
I'm not interested in flaming you, but I think you'll find this pretty interesting.
Thanks

It is supposed to be fool-proof in that only LYCOS "internal" content is linked in. However any curious kid could go to the Teacher Resources section where they are given a link to search the The Hotfiles software download library which gives you access to Quake, Doom, Duke Nukem, and adult-themed downloads.