\begin{tabbing} $\forall$$p$:FinProbSpace, $f$:($\mathbb{N}\rightarrow\mathbb{N}$), $X$:($n$:$\mathbb{N}\rightarrow$RandomVariable($p$;$f$($n$))). \\[0ex]rv{-}iid($p$;$n$.$f$($n$);$n$.$X$($n$)) \\[0ex]$\Rightarrow$ (E($f$(0);$X$(0)) = 0 $\in$ $\mathbb{Q}$) \\[0ex]$\Rightarrow$ nullset($p$;$\lambda$$s$.$\exists$\=$q$:$\mathbb{Q}$\+ \\[0ex](0 $<$ $q$ \& ($\forall$$n$:$\mathbb{N}$. $\exists$$m$:$\mathbb{N}$. (($n$ $<$ $m$) \& $q$ $\leq$ $\mid\Sigma$0 $\leq$ $i$ $<$ $m$. (1/$m$) $\ast$ ($X$($i$)($s$))$\mid$)))) \- \end{tabbing}