Complex sentence: The scientific community considers the evidence that HIV causes AIDS to be conclusive and rejects AIDS-denialist claims as pseudoscience based on conspiracy theories, faulty reasoning, cherry picking, and misrepresentation of mainly outdated scientific data.
Split into simpler sentences: The scientific community considers the evidence that HIV causes AIDS to be conclusive and rejects AIDS-denialist claims. Many researchers state that denialist claims are pseudoscience based on conspiracy theories, faulty reasoning, cherry picking, and misrepresentation of mainly outdated scientific data.