This by itself sums up Martin. He tries to make this point over and over and over again despite the fact that Frazier himself said his description is very unreliable. Martin know this yet he continues and all in his search for the truth.
3:18
Silly Brian.... confuses an estimate that can be unreliable and an firm observation about how Oswald carried the package. Frazier never said anything like that
"his description is very unreliable".
That Bugs used the "you were not paying much attention" argument to get Frazier to agree to the purely hypothetical proposition that he would not have been able to see the bag
if it had been protruding out on front of Oswald's body means very little to rational people. It did however show that Frazier was being honest in his testimony. Of course, he wouldn't have been able to see the bag
if it had protruded out.
The problem is (and this is where Brian gets confused) that there is not a shred of evidence that the bag actually ever did protrude out. That's just something Bugs invented! Instead we have Frazier firmly on record that he saw Oswald carry the bag cupped in his hand and under his armpit.