Abstract: The most controversial point between intentionalists and causalists is whether the relation of intention and action is logical or causal. Logical connection argument is posed by intentionalism to against causalism. Von Wright supports LCA and proves it in a new way. But concerning strong or weak logical relation, his view experienced a change from strong version into weak version. His view of change reflect the Neo-Wittgensteinian’ s probe on this subject, that is, to insist the peculiarity of explanation of action is to point out the misplace of causal explanation on one hand, and on another to base the explanation on the richness of social life which had to be accepted seriously.

Key words: logical independence, action, intention, logical relation, conceptual relation