You are going off recollection on what someone was recollecting, but you cant recollect exactly where you heard it. Not a strong place to start speculating imo.
Are u suggesting that by "couple" FSG might have meant a couple of girls? Isnt that EXACTLY what DG was looking for? Because above your recollection was that DG asked FSG if he had seen a couple of girls...and FSG said no, but had seen a couple under the bridge...yet now your raising into question that by "couple" he might have meant "couple of girls" which is what DG asked about, but by ur own recollection, FSG said he hadnt seen?
Im sorry, but you listed something as "fact" immediately followed by "possibly" and "might have." I mean, its also a fact that "possibly" BG was a method actor in a performance that "might have" gone wrong, doesnt mean its likely. I would imagine most would agree on what we would describe as "a couple." And if we saw 2 teenage girls, we wouldnt call them "a couple." If we saw an adult with a young teenage girl, we wouldnt call them "a couple." I mean, if u saw a 14 and 13 year old girl, and adult male combination you brought up, arguing under the bridge, someone asked u if you saw 2 girls...would you describe what you saw as "a couple?" No, you wouldnt.
Your recollection is that FSG said "something along the lines of, he didn’t see them, but there was a couple under the bridge." But now you are questioning whether FSG heard them...or saw them...or both? I'd add another "maybe" to your list:
Maybe FSG saw exactly what you recollect he says he did: a couple arguing under the bridge. Any twisting and manipulating of what he meant by "couple" is useless and irresponsible imo. Because by your recollection he didnt say he saw 3 people. Nor did he say he saw 2 girls. Nor did he say he saw a man and a girl. Something he saw lead him to believe they were a couple. So any speculation beyond that...doesnt make a lot of sense.
If u give it credence, then dont change or question what DG allegedly says FSG told him. Accept what he allegedly said: he didnt see 2 girls. He saw a couple.
No harm in speculating. But harm in spreading misinformation. If your not sure where you got the info, or even exactly what the info was/is....but post it here and speculate off of that, its careless and can spread misinformation.