well not so long ago you were agreeing with me that it would be impossible to prove anyway so what gives now?
in fact, it appeared to me that you were in tacit agreement on this issue - yes/no?
I do agree it would be all but impossible to prove, either in specific cases or that it even exists (so Im not really sure where youve even got the idea from). But without evidence the assertion should be considered as invalid as the idea that a teapot exists between Earth and Mars, and should be dismissed.
but besides this issue there is the undeniable fact of genetic abnormalities and all you can come up with are off-topic analogies and use of the linking argument.
Linking one topic to another does not prove a point.
Genetic abnormalities only come from reproduction, which we already agree should be banned. You havent provided any reason to ban incestuous sex at all, given that we have sufficient methods available in the form of contraception to virtually negate this issue.
Different rules and laws for different subject fields is the only realistic approach othewise nothing could ever get done.
I mean alcohol is legal but it doesn't logically follow on that all other drugs must be legal too.
Alcohol is legal with certain restrictions, because its only really dangerous in excess or when mixed with other things. Banned drugs are far more dangerous even in tiny amounts, so in most cases a blanket ban is reasonable. There are specific cases where arguments are made to legalise certain drugs but I think the law is more or less correct here.
Point is a standard is used based on how dangerous the drug is, which results in different rules for different drugs. Incest is not at all dangerous unless reproduction comes into play, so it makes sense to ban reproduction rather than the act itself.