The meaning of "Jem had no firm basis for his ideas, he said it was merely a twitch." in chapter 8 in TKAM is that Jem just said what he said as a spur of the moment without a solid plan.
<h3>What happened in
To Kill a Mockingbird?</h3>
This refers to the story that occurred in a very racist town when a lawyer Tom Sawyer decided to defend a black man accused of a crime and his family began to be attacked by his decision to defend the black man.
Hence, it can be seen that Jem was his child and did not have any firm basis for the idea which he said, but they just came out of his mouth, and was so scared the next day.
Read more about To Kill a Mockingbird here:
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