Question 1: Beowulf
Question 2: Grendel
A more natural and efficient way to run (last one)
Answer:
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No, it does not according to the study. the study states it is just a placebo effect (it works because you expect it to.)
An unreliable narrator is someone in which tells the reader a version of a story that cannot be taken true, or reliable.
The effect given off by an unreliable narrator could be incorrect or biased. Unreliable narrators are also keen to persuade readers into believing them.