Final answer:
In contract law, when there are ambiguities, they are usually construed against the party who drafted the contract, following the rule known as contra proferentem.
Step-by-step explanation:
When ambiguities arise in a contract, they are typically construed against the party who drafted the contract. This principle is known as contra proferentem, a Latin term meaning 'against the offeror'. This rule is applied as a last resort when other interpretive methods fail to clear up the ambiguity. It operates on the assumption that the drafter of the contract had the opportunity to clarify terms and chose not to, thus any lack of clarity should not be used to their advantage. Conversely, the party with the greater bargaining power, the promiser, or the promises might not necessarily be responsible for the contract's drafting and hence are not automatically penalized for ambiguities.