This question is related to the plot of the novel The Mechanic. Here is my answer: In the novel " The Mechanic," the protagonist, Stenson, was a mechanic. He was very smart, with superb skills and rich life experience. However, he was tricked into killing the old man. In the process, Stenson discovered that the old man was not an ordinary person but a villain hidden in the dark. Ol 'Amos used Stenson's trust to try to involve him in a conspiracy. Stenson was smart enough to realize this, but he was still deceived by the old man, which eventually led to a tragedy. Therefore, the answer was that although the protagonist Stenson was smart, he could also be deceived by others, especially those who lacked sufficient information and knowledge. Without enough experience and insight, it was easy to fall into the complicated interpersonal relationships and conspiracies and be used by others.