I agree with Andrew's answer and this is a common question. What the Client's lawyer is trying to do is get out any claim in law for innocent or negligent misrepresentation and I will assume they have successfully done this by writing that clause.
However, without deleting the compensation event for physical conditions, they have not got the Client off the hook for unexpected physical conditions as defined in the contract in clause 60.1(12) with reference to 60.2.
However, without deleting the compensation event for physical conditions, they have not got the Client off the hook for unexpected physical conditions as defined in the contract in clause 60.1(12) with reference to 60.2.