bitcoin core – Why blockchain new node verify all transactions in blocks?

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Hello I’m the student studying blockchain and bitcoin.

I have a question that why all node verify all transactions in blocks.

I check if new node connect bitcoin network, then the all transactions in blocks are verified.

The transactions before connecting new node are already verified, but why new node check all transactions in blocks???

I feel that “new node doesn’t check previous transactions” have some problems, but clear idea doesn’t know.

Please tell me why. ㅠ.ㅠ



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