I think the main point is that if amino-acids in the sample were left-handed they might have come from Earthly contamination of the sample. Since they are a mi

I think the main point is that if amino-acids in the sample were left-handed they might have come from Earthly contamination of the sample. Since they are a mixture of right and left-handed they definitely come from space. Chirality of life is not a consequence of panspermia, just a consequence of incompatibility so one had to win eventually.