I don't think it's what she/he's alluding to, but you could do the following:
A: creates a hash of a contract
B: creates a hash of the same contract
A sends 0.1BTC to B (and in the transaction message includes the hash). B receives the money and replies with 0.1BTC and the same hash (and the bitcoin notary keeps a cut). A year later, A claims that the contract said "any member of the board" instead of "most members of the board". So we go to the blockchain and verify what the contract said, and how the two people agreed through a transaction.
What does Bitcoin add? You can't erase the hash of the document to forge any part of it, and you can't erase the signature (transaction from A->B->A).
A: creates a hash of a contract B: creates a hash of the same contract
A sends 0.1BTC to B (and in the transaction message includes the hash). B receives the money and replies with 0.1BTC and the same hash (and the bitcoin notary keeps a cut). A year later, A claims that the contract said "any member of the board" instead of "most members of the board". So we go to the blockchain and verify what the contract said, and how the two people agreed through a transaction.
What does Bitcoin add? You can't erase the hash of the document to forge any part of it, and you can't erase the signature (transaction from A->B->A).