Contract formation between absent parties

A fictional Algerian civil-law exercise supplies the relevant rule for this problem: unless an agreement or applicable provision states otherwise, a contract between absent parties is concluded at the place and time when the offeror learns of the acceptance; knowledge is presumed when acceptance reaches the offeror, subject to contrary proof. The acceptance is written on Monday, dispatched on Tuesday and reaches the offeror on Wednesday. No contrary proof or different agreement is supplied. One learner chooses Monday because that is when the recipient of the offer decided to accept. Another chooses the dispatch event automatically. Students must apply the supplied reception-and-knowledge rule and distinguish it from a foreign mailbox rule without inventing a delivery failure.