The meanings of the sentences are contradictory as they present opposing ideas.
b. Contradictory
The meanings of the sentences are contradictory because in the first sentence 'All comedies are soon ended' implies a sense of finality, while the second sentence 'Today's dreams are tomorrow's challenges' suggests a continuation or transformation of dreams into challenges.
For example, the first sentence implies that comedies have a definite conclusion, whereas the second sentence implies that dreams evolve into future obstacles, showcasing opposing ideas.
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