The maxim that no party may take advantage of its own wrong does not enable a wronged party to assert an equitable interest that would defeat the rights of an innocent third party who acquired an equitable interest bona fide for value and without notice. Where a grantor fraudulently misrepresents that a condition precedent to an option has been triggered, the grantee's equity to enforce the option against the grantor cannot prevail over a subsequent equitable interest acquired by a third party purchaser for value without notice of the prior interest.
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