Q: It is better to make coffee using cold water rather than hot. Hot water sits in a heating tank. Sitting water loses oxygen. What was the purpose of stating that hot water sits in a heating tank?
Does anyone remember the exact wording of the correct answer?
Supports the premise that hot water loses oxygen? Sound familiar?
I was able to diagram this and came to the conclusion that the answer was that the statement supported the main conclusion, not the premise that stagnant water loses oxygen. It wasn't there to show that stagnant water loses oxygen. Water in a hot water heater is stagnant, stagnant water loses O2, which creates bad cooking water, therefore Water in a hot water heater implies bad cooking water. The hot water heater is merely an example of stagnant water, it does not support the premise that hot water loses oxygen.
Premise: Coffee tastes better when it is brewed with water that has more oxygen.
Premise: Stagnant water loses oxygen.
Premise to support Subsid. Conclusion: Hot water sits in a heating tank.
Subsidiary conclusion: Hot water loses oxygen
Conclusion: It is better to make coffee using cold water rather than hot.
That's my nifty diagram. Make sense?
I disagree that hot water losing oxygen is a subsidiary conclusion. I believe it was simply a premise. Thus my answer was then and I still believe it now to be "It supports the main conclusion and is itself supported by another premise."