There's a matter of degree too. I have strongly held opinions, fleeting opinions, contradictory opinions, opinions I don't really that much of a toss about, opinions I'm bored with, opinions that are probably wrong or at least illogical. It's only the first category on the list that I might be inclined to back up with evidence - the rest are largely good for shooting the shit and little more. If some pedant started demanding I back every bit of nonsense I come up with with facts and evidence, it would be a very short discussion. Sometimes we just want to chew things over, throw stuff out, play with ideas. lConversation isn't a randomised control trial.

Meanwhile...