 Since the speaker has used a semantically weaker expression (i.e., some) where a semantically stronger one (e.g., all) is available, he would contradict Grice’s Quantity Maxim if the semantically stronger sentence held. Consequently, he believes that the semantically stronger statement does not hold. Furthermore, he has not done anything to stop the addressee thinking that he so thinks, therefore he conversationally implicates that not all athletes  smoke.[35]