Fair Use Doctrine (Copyright)
An affirmative defense to copyright infringement permitting unlicensed use of a copyrighted work when justified under a four-factor balancing test.
Fair use, codified at 17 U.S.C. § 107, is an affirmative defense that permits certain unlicensed uses of copyrighted material, such as commentary, criticism, parody, news reporting, teaching, and transformative technology applications, without infringing the copyright owner's exclusive rights.
Courts weigh four statutory factors: the purpose and character of the use, including whether it is commercial and whether it is transformative; the nature of the copyrighted work; the amount and substantiality of the portion used relative to the whole; and the effect of the use on the market for the original. No single factor is dispositive, and courts weigh them together case by case.
In a simulation, fair use strength is modeled as a probabilistic defense dial rather than a yes-or-no switch, letting a user see how the infringement-liability branch shifts as transformativeness or market-harm evidence gets stronger or weaker.
How it actually shows up
Defendants raise fair use in response to an infringement claim whenever their use involves commentary, parody, education, or a transformative new purpose for the original work. Following decisions like Google v. Oracle and Andy Warhol Foundation v. Goldsmith, courts have placed particular weight on whether the use is genuinely transformative and on its effect on the market for the original.
- Is fair use a right you can assert before being sued?
- Fair use is technically an affirmative defense raised after an infringement claim is made, though parties often rely on it proactively to decide whether a use is likely defensible before proceeding.
- What makes a use 'transformative'?
- A use is transformative when it adds new purpose, meaning, expression, or character to the original work rather than simply serving as a substitute for it.
- Can a commercial use still qualify as fair use?
- Yes, commercial purpose is only one consideration under the first factor and does not automatically disqualify a use from being fair.
This page is an educational explainer, not legal advice, and creates no attorney–client relationship. Juricratic is a simulation engine: every probability-like figure is a dial you set, not a calibrated prediction. Verify every rule, deadline, and figure against the authorities and orders that govern your matter.
Turn the concept into a modeled matter.
Juricratic makes every one of these ideas a live dial: model your case as a solvable game, then watch the optimal line and the settlement window move as the assumptions do.
Request access →