Carr is making the argument that constant use of the internet can impact people's lives very intensely.
Although you did not present the text to which this question refers, through questions similar to yours, we can see that you are referring to the first chapter of "The Shallows" written by Nicholas Carr.
In this text, we can see that:
This impact is the main argument presented in the first chapter of the text. In this case, it is important to emphasize that an argument is an opinion defended by the author of a text.
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