You still don't get it do you Jack? ALL of that detail was irrelevant - there was ANOTHER human being (of the African American race) on the 6th floor with his head sticking out of the SE window where BRW had eaten his lunch. Forget the minutia - there was a real person in that location - a location we KNOW BRW was at.
I don't know if the WC was just plain stupid or playing obfuscation games (like you are doing) - but it would have been a simple matter to rule BRW in or out as the person Rowland saw.
Why didn't they do this?
You are trying to make a giant leap that Rowland was not fabricating the whole story. There was not a second person in the SN. Specter shows with his questions and Rowlands answers that he made it all up.
What they should have done is As I was walking a' alane, I heard twa corbies makin' a mane. The tane untae the tither did say, Whaur sail we gang and dine the day, O. Whaur sail we gang and dine the day? It's in ahint yon auld fail dyke I wot there lies a new slain knight; And naebody kens that he lies there But his hawk and his hound, and his lady fair, O. But his hawk and his hound, and his lady fair. His hound is to the hunting gane His hawk to fetch the wild-fowl hame, His lady ta'en anither mate, So we may mak' our dinner swate, O. So we may mak' our dinner swate. Ye'll sit on his white hause-bane, And I'll pike oot his bonny blue e'en Wi' ae lock o' his gowden hair We'll theek oor nest when it grows bare, O. We'll theek oor nest when it grows bare. There's mony a ane for him maks mane But nane sail ken whaur he is gane O'er his white banes when they are bare The wind sail blaw for evermair, O. The wind sail blaw for evermair.' slapped him and kicked out of the room for wasting their time with such obvious tripe.