Passage Summary: A biologist lists rules for plant X: fuzzy seeds mean long stems and no white flowers; curled leaves mean white flowers; thorny pods mean curled leaves. Their specific plant has a long stem and curled leaves.

Reasoning: The biologist provides conditional rules about plant X: fuzzy seeds imply long stems and no white flowers; curled leaves imply white flowers; and thorny seedpods imply curled leaves.

Analysis: In 'Must be True' questions, we treat the premises as absolute laws and look for what must follow. Since the garden plant has curled leaves, it must have white flowers according to the second rule. However, the first rule says fuzzy seeds mean no white flowers, so we can conclude this specific plant definitely does not have fuzzy seeds.