First, the lecturer contends that true statements are mistakenly classified as dishonest ones. The reason is that withholding information activates the same areas of the brain as lying . People often suppress information, producing results that indicate dishonesty. This casts doubt on the reading passage's claim that a brain scan lie detector does not misinterpret true statements as lies.
Next, the lecturer points out that brain scan results are not interpreted in an objective way. Each person's brain functions in a different way, and this means that there is no standard criteria that can be applied to all people. We still need to subjectively interpret the results, and this increases errors. This counters the reading passage's claim that a brain scan poly graph is advantageous because the results can be analyzed in an unbiased way.
Finally, the lecturer asserts that it may be easier to fool a brain scan polygraph. Performing a complex mental process causes overall brain activity to increase, which masks a lie. Furthermore, rehearsing an untruthful story results in neutral activity that indicates honesty when it is retold. This refutes the reading passage's claim that is is difficult to a brain scan polygraph.
여기에 굵음표시된 단어들에서, 왜 어떤거는 brain scan polygraphs이고, 어떤거는 a brain scan polygraph 인가요?