>>13928409"?1 is the first uncountable cardinal, so it is the cardinality of the set of countable ordinals. 2?0 is the cardinality of the setP(N) of all subsets of N, or the reals in [0,1]. If you accept the Continuum Hypothesis ?1=2?0 then [0,1] is an answer to your question." (Stolen from Quora)
