Passage Summary: A writer claims a scientific theory is bad simply because a different theory also explains the same evidence.

Conclusion: Lemaître's theory about the origin of the universe must be considered inadequate.

Reasoning: Although observations of receding galaxies support Lemaître's theory, the oscillating universe theory makes the exact same predictions.

Analysis: The writer's reasoning is flawed because it assumes that if a theory is not the unique explanation for a set of facts, it must be 'inadequate.' In science, multiple theories can often explain the same data, but that doesn't mean the first theory is wrong or insufficient; it just means the current evidence doesn't allow us to choose between them yet. The flaw lies in dismissing a theory solely because it has a competitor that shares its predictive power.