jdal claim is what required a link, since to that point it hadn't been in dispute. In the case of the Pentagon, the identity and veracity of the DNA evidence is the topic and has been in dispute since before gameboy entered the thread with his unsupported assurance.
All arguments rely on premise. For instance trusting the Pentagon DNA evidence requires the premise that the Armed Forces Institute of Pathology was not involved. You could certainly make the argument that is "dubious". But it wasn't the one jdaltroy made.He ascribes it a lower probability of being true just because the testing was done by "the government." That only works if you include the premise that all government employees share the motive to lie and participate in the cover-up, which is a dubious statement at best.