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From: GT on 26 May 2010 04:44 "Nick Finnigan" <nix(a)genie.co.uk> wrote in message news:htaul6$nev$1(a)news.eternal-september.org... > GT wrote: >> "Nick Finnigan" <nix(a)genie.co.uk> wrote in message >> news:ht6d4d$bh7$1(a)news.eternal-september.org... >>> GT wrote: >>>> OK, lets make it simple for the people that clearly didn't study and >>>> maths. Given 1 gallon of fuel, a car that can propel itself for 50 >>>> miles is more efficient than a car that can propel itself only 40 >>>> miles. Simple as that. >>> No. >>> >>>> The car with the higher MPG, burns fuel more efficiently. That clear? >>> Clear, but wrong. >> >> I said that a higher MPG equates to better efficiency. So the car doing >> 50MPG is more efficient than the car doing 18MPG. You simply say that is >> wrong, so you are saying that a car that can drive 18 miles on a gallon >> of fuel is more efficient than the car that can drive 50 miles on the >> same amount of fuel. > > No, I am saying there is not enough information to decide How can we reason with a statement like "50MPG versus 18MPG = not enough informatino to decide which is more efficient"!
From: Albert T Cone on 26 May 2010 09:40 GT wrote: > "Nick Finnigan" <nix(a)genie.co.uk> wrote in message > news:htaul6$nev$1(a)news.eternal-september.org... >> GT wrote: >>> "Nick Finnigan" <nix(a)genie.co.uk> wrote in message >>> news:ht6d4d$bh7$1(a)news.eternal-september.org... >>>> GT wrote: >>>>> OK, lets make it simple for the people that clearly didn't study and >>>>> maths. Given 1 gallon of fuel, a car that can propel itself for 50 >>>>> miles is more efficient than a car that can propel itself only 40 >>>>> miles. Simple as that. >>>> No. >>>> >>>>> The car with the higher MPG, burns fuel more efficiently. That clear? >>>> Clear, but wrong. >>> I said that a higher MPG equates to better efficiency. So the car doing >>> 50MPG is more efficient than the car doing 18MPG. You simply say that is >>> wrong, so you are saying that a car that can drive 18 miles on a gallon >>> of fuel is more efficient than the car that can drive 50 miles on the >>> same amount of fuel. >> No, I am saying there is not enough information to decide > > How can we reason with a statement like "50MPG versus 18MPG = not enough > informatino to decide which is more efficient"! Well anybody of a scientific bent would probably define efficiency as the ratio of total useful energy output to total energy input. A heavier or less aerodynamic car might well be more efficient, but less /economical/. Yes, it's pedantry, but then this is usenet.
From: Nick Finnigan on 26 May 2010 13:25
GT wrote: >> No, I am saying there is not enough information to decide > > How can we reason with a statement like "50MPG versus 18MPG = not enough > informatino to decide which is more efficient"! By specifying what fuel is being used in each case e.g. Octane, Hydrogen. |