Why pasting a classmate's text into ChatGPT can hijack your AI session.
7 min · Reviewed 2026
The big idea
People can hide instructions in white text or document metadata that hijack AI when you paste their content. It's prompt injection — and it's already in classroom group projects.
Some examples
A 'helpful summary' from a classmate makes ChatGPT lie to you.
White-on-white text is invisible to you but readable to AI.
PDFs and Google Docs both can hide injection payloads.
Always paste suspect text into Notes first — it strips formatting.
Try it!
Copy any document you've received this week. Paste it into Notes or a plain-text editor and look for hidden white text.
End-of-lesson check
15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-builders-ethics-safety-AI-and-prompt-injection-school-projects
What is the core idea behind "AI and Hidden Instructions in Shared Documents"?
Why pasting a classmate's text into ChatGPT can hijack your AI session.
scaffolded use
RLHF
Ask your friend before using their photo with any AI tool
Which term best describes a foundational idea in "AI and Hidden Instructions in Shared Documents"?
invisible text
prompt injection
collaboration risk
verification
A learner studying AI and Hidden Instructions in Shared Documents would need to understand which concept?
prompt injection
collaboration risk
invisible text
verification
Which of these is directly relevant to AI and Hidden Instructions in Shared Documents?
prompt injection
invisible text
verification
collaboration risk
Which of the following is a key point about AI and Hidden Instructions in Shared Documents?
A 'helpful summary' from a classmate makes ChatGPT lie to you.
White-on-white text is invisible to you but readable to AI.
PDFs and Google Docs both can hide injection payloads.
Always paste suspect text into Notes first — it strips formatting.
Which of these does NOT belong in a discussion of AI and Hidden Instructions in Shared Documents?
scaffolded use
PDFs and Google Docs both can hide injection payloads.
A 'helpful summary' from a classmate makes ChatGPT lie to you.
White-on-white text is invisible to you but readable to AI.
What is the key insight about "The rule" in the context of AI and Hidden Instructions in Shared Documents?
scaffolded use
RLHF
Strip formatting before pasting anyone else's content into an AI tool.
Ask your friend before using their photo with any AI tool
Which statement accurately describes an aspect of AI and Hidden Instructions in Shared Documents?
scaffolded use
RLHF
Ask your friend before using their photo with any AI tool
People can hide instructions in white text or document metadata that hijack AI when you paste their content.
What does working with AI and Hidden Instructions in Shared Documents typically involve?
Copy any document you've received this week. Paste it into Notes or a plain-text editor and look for hidden white text.
scaffolded use
RLHF
Ask your friend before using their photo with any AI tool
Which best describes the scope of "AI and Hidden Instructions in Shared Documents"?
It is unrelated to ethics-safety workflows
It focuses on Why pasting a classmate's text into ChatGPT can hijack your AI session.
It applies only to the opposite beginner tier
It was deprecated in 2024 and no longer relevant
Which section heading best belongs in a lesson about AI and Hidden Instructions in Shared Documents?
scaffolded use
RLHF
Some examples
Ask your friend before using their photo with any AI tool
Which section heading best belongs in a lesson about AI and Hidden Instructions in Shared Documents?
scaffolded use
RLHF
Ask your friend before using their photo with any AI tool
Try it!
Which of the following is a concept covered in AI and Hidden Instructions in Shared Documents?
prompt injection
invisible text
collaboration risk
verification
Which of the following is a concept covered in AI and Hidden Instructions in Shared Documents?
prompt injection
invisible text
collaboration risk
verification
Which of the following is a concept covered in AI and Hidden Instructions in Shared Documents?