Exclusion of evidence to explain or amend ambiguous document .—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 “one lakh rupees or one lakh fifty thousand rupees ”.
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.