My partner and I have begun playing Anti over opponents NT. Not sure if it is widely played in the US, but the core bids are: 2 ♣ shows ♦ OR both majors 2♦ shows ♥ OR ♠ and a longer minor 2♥ shows ♥ and a minor 2 ♠ shows ♠ 2NT shows both minors. Generally where the bid can be one of two hand types partner responds the lowest option as a relay, or bids 2NT to enquire with a good hand. A bid came up for the first time the other day over which we have had a disagreement. I overcalled 2♦ and rather than relaying 2♥ partner bid 2♠ instead. I took this a paradox-type bid (like over a multi 2♦ opening) showing tolerance for ♥, whereas partner meant it as natural - he had 4 spades. Looking online, although there is not much material on Anti, what there is seems to support him, and it seems I should apologise. However, I am wondering why this is, as the paradox bid seems to make much more sense to me. Why commit us to 3♥ if I have ♥ rather than ♠ and a longer minor. And if he has ♠ why not wait and raise or pass a 2 ♠ rebid if I make one? Would welcome any thoughts. Thanks.