Then it could be Gemini. Gemini people are quick-witted, quick-thinking and very good at arguing. Even they don't need to think in their heads at all. Unconsciously, they can find words to argue with you on the spot first, and they don't necessarily say that the other party can beat them. If their brains are not as fast as theirs, they may have to wait until later to discover many small holes in their speech.
Then it may be Aries. Aries is also the constellation whose mouth is faster than the head. Encounter this kind of thing, as long as it is different from their own ideas, they will subconsciously refute and argue, unwilling to lag behind, unwilling to admit defeat, and once their ideas are formed, they will be very confident that they are right, and then change their ways to let the other party admit it.
In fact, no matter which constellation or everyone, they probably don't have enough courage to accept and correct their mistakes in time. Most people may have that subconscious reaction to defend themselves when they encounter ideas different from themselves, unless they are particularly rational or not confident.