High-integrity information separates fact from fiction, opinion and inference, admits uncertainty, says how well it was checked and can be traced to its source. Generative AI makes it easier to produce content that blurs those lines at large scale. Misinformation is false content spread without meaning to, often from confabulation; disinformation is made on purpose to deceive. Deepfakes are highly realistic synthetic media, and false content can make people trust real evidence less. Provenance tracking records where content came from, using visible or hidden watermarks and metadata. Generative AI makes copying, exposing trade secrets and plagiarism easier, and how it fits with copyright is still being debated. Laws about property and data can help and harm.