Answer:
True.
Step-by-step explanation:
The bilateral error can be observed when an essential error occurs in a document, contract or Will, with the two parts involved, that is, the parties involved in the document did not consent to the placement of a specific clause, which makes the document has a defect that invalidates it and must be investigated and repaired. This investigation is what will happen in Will shown in the question above, as the lawyer suspects that this presents a bilateral error.