From: GT on
"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
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
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.