* General use: The study's methodology was flawed, leading to unreliable results.
* With a specific flaw: Her plan was flawed by its reliance on unreliable data.
* Figurative language: His logic was flawed, full of holes like a sieve.
* Emphasizing the impact: The company's flawed security system led to a major data breach.
* Describing a person: Despite his flawed personality, he was a brilliant scientist.
Remember that "flawed" implies a defect or imperfection, but it doesn't necessarily mean something is completely broken or useless.