John Wilson; Equality Revisited, Journal of Philosophy of Education, Volume 27, Issue 1, 30 May 2006, Pages 113–115, https://doi.org/10.1111/j.1467-9752.1993.tb.

ABSTRACT John Wilson argued, in a recent paper, that equality of opportunity is neither coherent nor reasonable. It seems that we can better understand Wilson's points If we distinguish between what one might call perfect equality of opportunity and greater equality of opportunity. Further, the familiar notions of formal opportunity and substantive opportunity still seem crucial to an understanding of the issues.