We covered this in the technical introduction, but it bears reinforcing now that you have spent time with these tools. AI will confidently present false information. It will fabricate statistics, invent quotes, and cite sources that do not exist. This is not a bug. It is how the architecture works. The practical rule: use AI to draft, use your brain to verify. Be especially cautious with numbers, dates, specific claims, and anything medical, legal, or financial. If it matters, check it.

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We covered this in detail in Part One, but it bears repeating: pay for the subscription if you are doing professional work. Paid plans offer stronger privacy protections across all major tools. Never paste credentials, personal identification, or confidential client data into any AI tool without understanding the privacy implications. When in doubt, anonymise.