s 95 Exclusion of evidence to explain or amend ambiguous document
95. When the language used in a document is on its face ambiguous or defective, evidence may not be given of facts which would show its meaning or supply its defects.Illustrations (a) A agrees in writing to sell a horse to B for $500 or $600. Evidence cannot be given to show which price was to be given. (b) A deed contains blanks. Evidence cannot be given of facts which would show how they were meant to be filled.