Context of Tepid

It is worth noting that the geometric interpretation of general relativity hasn’t been universally popular. The late physicist Steven Weinberg whom I admired deeply, wrote in his 1972 textbook on the subject that “the geometric interpretation of the theory of gravitation has dwindled to a mere analogy, which lingers in our language in terms like ‘metric’… but is otherwise not very useful. I laughed while writing this up because, of course, I have just told you that calculating the metric — the distance measure — is the most important thing in general relativity, and here is a Nobel laureate saying it is a tepid analogy. In my defense, Weinberg goes on to say his views are “heterodox” and that most people would disagree with him.
–New Scientist

Which of the following BEST interprets the meaning of “tepid” in the passage?

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–A new way to visualize General Relativity | Video by ScienceClic English

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