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We have the following indirect implication of form equivalence classes:

203 \(\Rightarrow\) 93 given by the following sequence of implications, with a reference to its direct proof:

Implication	Reference
203 \(\Rightarrow\) 170	Non-constructive properties of the real numbers, Howard, P. 2001, Math. Logic Quart.
170 \(\Rightarrow\) 93	Zermelo's Axiom of Choice, Moore, [1982]

Here are the links and statements of the form equivalence classes referenced above:

Howard-Rubin Number	Statement
203:	\(C\)(disjoint,\(\subseteq\Bbb R)\): Every partition of \({\cal P}(\omega)\) into non-empty subsets has a choice function.
170:	\(\aleph_{1}\le 2^{\aleph_{0}}\).
93:	There is a non-measurable subset of \({\Bbb R}\).

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