pt 61, S.2, Q 16, thermophotovoltaic generators .. Forum

[flash21]

Hi can someone explain this to me thoroughly - more specifically why B is wrong?

I went to manhattan but still didn't understand for some reason.

I understand now why (C) is correct, because the last sentence says to save money which would be impossible if the generators did not save enough money to cover the costs. However..

I still do not see how if some of the heat could not be converted into electricity, this does not make the argument fail?

Thank you!!

[sanibella]

Hi can someone explain this to me thoroughly - more specifically why B is wrong?

I went to manhattan but still didn't understand for some reason.

I understand now why (C) is correct, because the last sentence says to save money which would be impossible if the generators did not save enough money to cover the costs. However..

I still do not see how if some of the heat could not be converted into electricity, this does not make the argument fail?

Thank you!!

I blind reviewed this yesterday! I chose C but was stuck between B and C when I was taking the test. So you understand that if C were to be negated, the argument would be destroyed. But that's not the case with B. The word "currently" was the big indicator for me. The whole argument is about a proposal- which is something that will happen in the FUTURE. So what if CURRENT technology can't convert heat into electricity? We aren't worried about what CURRENT technology is capable of- we are interested in the FUTURE. So negating that doesn't destroy the argument. Even if CURRENT technology can't convert heat into electricity, it is still quite possible that FUTURE technology could convert heat into electricity. Does that make sense?

[flash21]

ah, I see.

super subtle.. irritating!

[joewoo198256]

Using negation test: Using current tech, it is impossible to feed the heat to convert at least....; does it hurt the argument here? Yes, maybe, just maybe, it is not possible for us under current condition to feed the hear to convert ...., but what about someday in future we can? We are talking about a possibility here. Actually negating B is negating the premise here, usually we don't attack the premise, we just accept it!