Novel X and Novel Y are both semiautobiographical novels and contain many very similar themes and situations, which might lead one to suspect plagiarism on the part of one of the authors.
Phenomenon
Novel X and Novel Y are both semi-autobiographical novels and contain many very similar themes and situations.
Opposing Point
Which might lead one to suspect plagiarism on the part of one of the authors.
Evidence
Both authors are from very similar backgrounds and have led similar lives.
Conclusion
However, it is more likely that the similarity of themes and situations in the two novels is merely coincidental.