One neener that was pulled under my foots:
Last night we were looking on line at water bottles with my SO who wants to replace his metallic one (the freebie kind, he doesn'treally trust it, I think he's wise to). I ask him what's the capacity and he just won't accept the fact that it just cannot be a 1L bottle, it's the same size as my 0.75L one, a tiny bit smaller even! Small back and forth, I drop the subject (SO is the kind that will never really accept being wrong right there and then).
This morning he had left the bottle in the kitchen so I check it, as I thought, 0.75L.
But when I asked (computer chat) how much he wanted to bet on his 1Litre bottle he admitted to having checked this morning too, and that he was wrong ><, I didn't get to neener or get something out of it
If it sounds petty it's because it is, but since he is such a know-it-all I now never pass an occasion to remind him (gently) that no, he's not always
right. Anyone else and I wouldn't mention anything.