How many people are in a pair of twins? Two or four? This debate has gone on between friends for too long.?

Arguments for 2 people: A pair of chopsticks is two sticks. Arguments for 4 people: Twins automatically implies the plural number of 2, therefore a pair must be 4. A pair of pants is one set of trousers though so I guess it could be whether the twins are described as separate people or a pair... (good luck... show more Arguments for 2 people: A pair of chopsticks is two sticks.
Arguments for 4 people: Twins automatically implies the plural number of 2, therefore a pair must be 4.
A pair of pants is one set of trousers though so I guess it could be whether the twins are described as separate people or a pair... (good luck understanding that...)

Please solve this dilema for us. Thanks.
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