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To rephrase what you just said: Mexicans, because of their ethnicity, are less able to understand (for instance) mathematics, even when given the same amount of instruction, than people of the ethnicities that characterize the population of California circa the 1960s (i.e. predominantly white). Did I get that right?

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Mexicans in general score lower on tests of English and math, both in Mexico and America. See for one example: http://www.infoplease.com/ipa/A0883611.html#axzz0xaC7EpRR This data is well known and not-controversial. The reasons for the test score disparity are quite controversial.

My point is simple. You have a group A of 10 million that on average score 450 on the math SAT. You have a group B of 10 milllion that score 500 on average. If you randomly move 5 million from group A to group B, then statistically, the average score of group B will fall to ~481.

Thank you for the numbers. Point well made.

Ah, and a racist troll to boot! Hilarious!

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