You said "The DNA we are leaking is impossible to copy unlike the DNA we are sending to 23andme." I said it was wrong because if people collect environmental h

You said "The DNA we are leaking is impossible to copy unlike the DNA we are sending to 23andme." I said it was wrong because if people collect environmental human DNA samples and "copy" them (amplify with PCR). Not sure what you mean about destroying the sample- you typically take part of the sample and amplify it without destroying the whole thing. I'm just unsure of what you are trying to say here; I'm responding with purely factual answers based on modern DNA technology.