Sorry, that was Lazurus'. But like him you know you should you try to be logical, yet still 'have a hunch' and agree with his disclaimer:
Will be there another time in my life when I would be so confident that the $hit is about to hit the fan...?..I don't think so...
With the possible exception of Buffett, I don't know how anyone can be confident in their market hunches.
And the thing is, "ultra great investments" are rare. And they don't look like "really easy to understand, extremely attractive" bets at the time.
But if 80/20, you're only talking about investing at the margins (where's your confidence?). That's not what Lazarus (50/50) is struggling with.