In analysing [A. V.] Dicey’s version of the rule of law, it can be seen that it venerated formal equality at the expense of substantive equality. In other words, he thought that the law and the State should be blind to the real concrete differences that exist between people, in terms of wealth or power or connection, and should treat them all the same, as possessors of abstract rights and duties.
Source: p 23, The English Legal System 2012-2013, Gary Slapper. Italics are the book's, bolds mine.
Which definition of formal applies here? Defn 3 states
Of or concerned with outward form or appearance as distinct from content: ,
but wouldn't these outward substances contradict Dicey's preference of 'abstract rights and duties'?