Conduct that is merely consistent with acceptance of an offer, but equally consistent with other explanations, is insufficient to establish implied acceptance; the conduct must positively evidence to a reasonable person in the position of the offeror that the offer has been accepted. The pursuit of a related but distinct objective (here, annual renewal) does not constitute implied acceptance of a separate offer (here, interim 14-day cover), even where both arise in the same commercial context. An insurer's offer of cover in return for a premium is a bilateral, not unilateral, contract.
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