No, there's the truth, based on opinions, and the truth based on actual evidence. I always go for evidence, the more solid, the better. Circumstantial evidence, carries far less weight.
It's a simple concept, perhaps you ought to try it sometime.
Your only 'evidence' seems to be that one person was in Bristol and the other was in Glasgow in the late 80's
Err, that's not what I said, I said...
Chris Morris was still producing "No Known Cure" for BBC Radio Bristol, and "The Chris Morris Show" for BBC GLR at the time. Armando Iannucci was still at BBC Radio Scotland producing "No' The Archie McPherson Show".
Both guys were producing radio, ironically both producing similar style satirical programming. Chris Morris was still at GLR in early 1993, so he didn't spend that whole year working on The Day Today, he was still producing radio. Without somebody thinking that On The Hour could transfer to TV, they'd still be producing satirical radio. Radio was their home medium, their first language almost.
In fact, he brought back On The Hour as a podcast in 2008, the episodes he produced are still online. Although he's done lots of work off camera, such as directing episodes of Veep, it's my belief that he's at heart a radio person first and foremost.
It's not something we've just 'cooked up' (to quote your Tweet from earlier)
Are you kidding me? It's about as cooked up as claiming Barack Obama was born in Kenya. Someone could see similarities, and they thought that was enough evidence to make a spurious claim. Not even remotely close. It's well and truly cooked up.