TEAS Reading Comprehension Practice Test 3

The words “documented”, “explained” and “understood” are not suitable adjectives for the noun “reliability”, and can straight-away be discarded for that reason.
Since it is logical to say that, if the available knowledge is inadequate, the reliability of the advice based on such limited knowledge cannot be guaranteed, “inadequate; guaranteed” is a suitable choice. Thepair “extraneous; denied” does not result in a logical sentence, and is wrong.