**update: He's now arguing that studies have "proven" that the gender wage gap is not 30%, as touted, but actually closer to 4%. He's telling us that these newer, more objective studies compare "apples to apples" and compare women and men in the exact same position, with the exact same experience and personal attributes, and therefore come to more accurate conclusions.
But is there really an equal number of women and men in the exact same positions? Are there really the same number of female and male CEOs? Of course not. Occupations and industries are highly gendered. You can't compare apples to apples because women simply don't have the same opportunity to become an "apple."