ILoveTTATT2: If the average of the 1970 group is 20 years (i.e. most left in the 90's), and the average of the 2000's group is 10, meaning most left in 2010, then the statement that the exit is speeding up is valid.
Again, your conclusion does NOT follow from your premise.
You have presented this argument:
- If (2015 - 1975) / 2 = 20, and (2015 - 1999) / 2 <= 10, then "the exit is speeding up."
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It is the logical equivalent of this:
- If Obama is President of the US and Anthony Morris III has a thing about tight pants and colored socks, then my dog is a cat.
- Barack Obama IS President of the US, and Anthony Morris III DOES have a thing about tight pants and colored socks, therefore: my dog MUST be a cat.
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The significant difference is that--while I think there might actually be something to your conclusion even though the scientific data supporting it is sketchy* --your conclusion does NOT follow from your premise.
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