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_____ though it seemed to many mathematicians, the Marden tameness conjecture, posed in 1974, eventually yielded to the efforts of lan Agol, who presented a proof of it in 2004.
|Question 4Verbal
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Which choice completes the text with the most logical and precise word or phrase?
Insuperable
A
Unequivocal
B
Irreproachable
C
Ineluctable
D