The author's main purpose in the final paragraph of the text is: to encourage readers to think about the consequences of even seemingly harmless actions.
In the final paragraph of "How Small Fibs Lead to Big Lies," Tali Sharot tells NPR that the new findings about lying require that more work be done to find out how smaller actions lead to the escalation of negative behaviors.
So, the author's main purpose is to get readers to think of the effects that can arise from actions that do not seem harmless.
Learn more about the purpose of a text here:
https://brainly.com/question/11807917