Final answer:
The tape recordings that would make clear President Nixon's knowledge of Watergate were found to be incomplete.
Step-by-step explanation:
The tape recordings that would make clear President Nixon's knowledge of Watergate were found to be incomplete. These tapes were secret recordings made by Nixon in the Oval Office, which were eventually discovered during the investigation into the Watergate scandal. Although some portions of the tapes were missing, the recordings that were released to the public still revealed Nixon's involvement in the cover-up and the obstruction of justice.
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