Police officers recognize gunfire more than the average civilian..
Over a dozen of them said they heard shots from the Grassy Knoll area.
Some said they heard shots from both the Knoll and TSBD.
I know that ear and eye witnesses aren’t the most reliable evidence but if dozens of people, including police officers, reported hearing shots fired from that direction, then it means something might’ve happened there.
Having a second shooter makes perfect sense as a plan B if one assassin fails to get the kill shot.
Most Americans didn’t see the Zapruder film or even know it existed until the 1970s.
Why are you ignoring the significant impact of my post and deferring to your default position of appeal to authority? This has zero to do with recognizing gunfire per se, as we are discussing locating two loud audio sources from either end of Dealey Plaza and it doesn't take a trained brain to calculate the difference in the loudness and perceived direction of these sounds.
The majority of earwitnesses were between the Depository and the Grassy Knoll and the vast majority of these earwitnesses say the loud sounds emanated from either one end of Dealey Plaza or the other end, and there was only a tiny amount of earwitnesses who say that these loud sounds came from multiple directions.
Thus all the loud sounds came only from one direction and since we know that both Kennedy and Connally were struck from behind, it can only follow that ALL the shots came from behind, there can be no other conclusion.
You yourself state that "Over a dozen of them said they heard shots from the Grassy Knoll area." and only "Some said they heard shots from both the Knoll and TSBD", meaning that those Police Officers who thought they heard ALL the shots from the Grassy Knoll area by definition must be wrong because we know beyond all doubt that both men were struck from behind.
JohnM