GRE Text Completion Question 2760

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Source: Magoosh

When researchers follow the scientific method, the absence of (i)_____ proof by no means suggests a theory lacks validity. Indeed, no theory is (ii)_____ : each can always be subject to further testing and scrutiny, and thus, by definition, remains (iii)_____.

Blank(i)Blank(ii)Blank(iii)
A ineffable D cherished G equivocal
B sufficient E porous H suspect
C irrefutable F unassailable I provisional

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