Circular thinking here = "I like baseball because it [baseball] ... teaches me about [baseball]."
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I see no parallel construction problems nor any fragment, but I do see that error in thinking.
Instructions: revise to remove fragnments and/or parallelism errors.
?1. I like basebal because it is fun and teaches me about the sport.
2 answers
I like baseball, I can learn about the sport and it is also fun.