Written by attorneys · grounded in primary & secondary sources — see below
An uncertainty of meaning or intention in a word, phrase, or provision appearing in a legal document or statement.
Sources & Authorities
How it applies
Common Examples
6
Ambiguous Miranda Invocation
During custodial interrogation Alexis Archer stated that maybe she should talk to a lawyer. The officers continued questioning without stopping because the statement did not clearly request counsel. Archer later moved to suppress her responses on the ground that questioning should have ceased.
Vague Pleading Prompts Motion
Ariana Azizi filed a complaint against Anchor Bank alleging improper account handling but omitted dates and transaction details. The bank moved for a more definite statement before answering, pointing out that it could not reasonably prepare a response. The court ordered Azizi to file an amended complaint within fourteen days.
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Cases
Statutes
Federal Rules
Uniform Acts
Restatements
Dictionaries
Alliance Holdings told Avalon Pharmaceuticals that a product component was safe while omitting known stability data that would have shown otherwise. Avalon relied on the statement and suffered losses after the component degraded. Avalon sued for nondisclosure arising from the misleading partial account.
Will Ambiguity Resolved by Construction
Alfred Ashford's will left property to his children but used language that could be read either per stirpes or per capita. The court applied the applicable rule of construction favoring equal division among living descendants. Evidence of a contrary intention was absent so the rule controlled.
Latent Ambiguity Cured by Evidence
Arthur Abrams's will devised Blackacre but the testator had never owned land by that name. Extrinsic evidence showed the description matched Whiteacre that Abrams did own and revealed his intent to pass that parcel. The court construed the will to devise Whiteacre rather than allow the gift to fail.
Expert Testimony Language Clarified
Alexandra Armstrong's experts stated that a drug was capable of causing birth defects. The court examined whether that phrasing meant the drug actually caused the plaintiffs' injuries or merely could do so in some cases. The ambiguity prevented the testimony from satisfying the required showing of causation.
Daubert v. Merrell Dow Pharmaceuticals, Inc.509 U.S. 579, 592 (1993)
Common questions
Frequently Asked
5
What standard determines whether a suspect has invoked the right to counsel?+
A suspect must articulate the desire for counsel clearly enough that a reasonable officer would understand the statement as a request. Vague remarks do not trigger the obligation to stop questioning although officers may seek clarification.
When may a party move for a more definite statement under the Federal Rules?+
A party may move when a pleading is so vague or ambiguous that a responsive pleading cannot reasonably be prepared. The motion must be filed before the responsive pleading and must specify the defects and desired details.
How is ambiguity resolved in donative instruments?+
A rule of construction applies unless evidence shows the donor had a different intention. Direct and circumstantial evidence of intent may be considered once ambiguity is established.
When may extrinsic evidence resolve a latent ambiguity in a will?+
Extrinsic evidence may identify the intended property when the will's description matches no land the testator owned but closely matches land actually owned. The court may then construe the will to pass the intended parcel.
Does a partial or ambiguous statement create a disclosure duty in a business transaction?+
A party must disclose matters known to be necessary to prevent a partial or ambiguous statement from misleading the other side. Failure to disclose under those circumstances supports liability for nondisclosure.
381 U.S. 479 (1965)Constitutional Law
…substitute for the Fourth Amendment's guarantee against "unreasonable searches and seizures." "Privacy" is a broad, abstract and ambiguous concept which can easily be shrunken in meaning but which can also, on the other hand, easily be interpreted as a constitutional ban against many things other than searches and seizures. I…