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I know that it is possible to create a 2-2 multsig using Taproot by combining both private keys into one public key and defining that as the key path spend. I also know that it is possible to use Tapscript to do the same thing with a script path spend using OP_CHECKSIGADD.

Is it also possible to use key aggregation in the script path spend, by just providing a public key and signature but doing the same key aggregation as in the key path spend? If so, would it ever make sense to use a "normal" OP_CHECKSIGADD operation in the case of multisig (not threshold signatures).

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