Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: Any one of us who has studied elementary alchemy could blow a globe of it to the right size for the sky dome. Choices:  1. No one knows how to make the globe the right size. 2. Even without formal training, some of us can make the globe the right size. 3. Any student of basic alchemy could make a globe the right size for the sky dome.

1