Ideas in this flowchart

• The passage contrasts an uncertain nuisance standard with different legal rules for noise and jet fuel.
• The substantial-and-unreasonable test lies far toward the standards end of the rule-standard spectrum.
• The test provides no objective, non-controversial measure of what is or is not a nuisance.
• This lack of clarity may be considered a defect because it fails to give people clear notice.
• The uncertainty harms planning.
• People may mistakenly avoid uses that would not be considered nuisances.
• People may make uses that will be considered nuisances.
• The legal treatment differs according to whether the interference is intangible or tangible.
• Most courts would consider noise to be intangible.
• If loud noise is actionable, it is regulated as a nuisance.
• Proving a nuisance requires showing harm.
• Jet fuel is a tangible object, even in small quantities.
• A leak of jet fuel onto another person's property constitutes a trespass.
• Trespass does not require a showing of harm.