New York is smaller than Blacksburg. Blacksburg is the capital of Texas. New York is smaller than the capital of Texas. This swan is white. That swan is white. . .
All swans are white.
The skater is not interacting with any external object in such as way as to alter her angular velocity. The skater reduces her moment of inertia by drawing her arms in close to her body. Therefore, the skater's rate of rotation increases. The explanation must be a deductively valid argument. The premises must contain at least one generalaw that is required for the derivation of the conclusion.