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Let’s assume I am a developer of Bitcoin wallet.

If I create a

private key
without implementing a
seed phrase
methodology (not using the principles of BIP32 and BIP39), is there at least the slightest chance that by generating a
public key
and
address
based on that public key, I will not be able to spend my bitcoins – because the
signature
doesn’t prove that the owner of a private key produced a given message?