the old improbable probability problem

In terms of chirality I suspect Zaius means that the products of the original Urey-Miller experiment occurred in a racemix mix with equal proportions of dextro and levo rotatory amino acids. Since in living organisms the amino acids are almost exclusively levorotatory this is often put forward as a problem for abiogenesis by creationists.I know you are familiar with the argument so I assume that your question to Zaius was rhetorical or socratic in nature.TTFN,WK