In legal usage, “conclusory” describes a statement that asserts a legal conclusion without providing the facts that would support it. The conclusory definition matters in law because courts across the federal system, and many state systems that follow the same approach, refuse to credit these bare assertions. A conclusory allegation skips to the result the pleader wants (negligence, breach, discrimination, fraud) without describing what actually happened. Two Supreme Court decisions, Twombly in 2007 and Iqbal in 2009, made rooting out conclusory language a central task of federal pleading review, and the same skepticism carries through to summary judgment affidavits and expert opinions.
What a Conclusory Statement Looks Like
The clearest way to understand the term is by comparison. “The defendant was negligent” is conclusory. “The defendant ran a red light at 50 miles per hour and struck the plaintiff’s vehicle in the intersection” is factual. Both point toward the same legal theory. Only the second gives a court something to evaluate.
The pattern repeats across every area of law:
- In contract: “the defendant breached the agreement” is conclusory. Identifying the provision, the performance date, and what the defendant did or failed to do is factual.
- In discrimination: “the employer discriminated against the plaintiff” is conclusory. Describing specific actions, comments, or patterns of treatment is factual.
- In contract formation: “the parties entered into a valid contract” is a legal conclusion. “On March 15, the plaintiff and defendant signed a written agreement requiring the defendant to deliver 500 units by June 1” is a factual allegation.
The problem with conclusory language is that it asks the court to accept the legal conclusion on the pleader’s say-so rather than draw its own inference from facts. Judges will not do that.
Why Courts Reject Conclusory Allegations
Federal Rule of Civil Procedure 8(a) requires “a short and plain statement of the claim showing that the pleader is entitled to relief.”1Legal Information Institute. Rule 8. General Rules of Pleading For decades, courts read that requirement loosely. That changed with two decisions.
In Bell Atlantic Corp. v. Twombly, the Supreme Court held that a complaint must contain enough factual matter to state a claim that is “plausible on its face,” and that “more than labels and conclusions” are required. A “formulaic recitation of the elements of a cause of action will not do.”2Cornell Law Institute. Bell Atlantic Corp. v. Twombly A plaintiff cannot simply repeat the legal elements and expect to proceed.
Two years later, Ashcroft v. Iqbal extended that standard to all federal civil cases and gave courts a two-step method. First, identify statements that are “no more than conclusions” and set them aside because they are “not entitled to the assumption of truth.” Second, take whatever well-pleaded factual allegations remain, assume they are true, and ask whether they “plausibly give rise to an entitlement to relief.”3Legal Information Institute. Ashcroft v. Iqbal If nothing but conclusory language remains after step one, the case is dismissed at step two.
This is now the standard framework federal trial courts apply to any motion to dismiss, and many state courts have adopted similar plausibility rules.
Where Conclusory Language Sinks a Case
Motions to Dismiss
Rule 12(b)(6) permits dismissal when a complaint fails “to state a claim upon which relief can be granted.”4Cornell Law School. Rule 12 – Defenses and Objections The judge reads the complaint, strips out bare legal conclusions, and evaluates what remains for plausibility. Courts do not demand a proven case at this stage. They look for enough factual content to make the alleged wrongdoing a reasonable inference rather than speculation. A fraud plaintiff, for example, does not need to prove the defendant’s state of mind at the outset, but must describe conduct that plausibly suggests fraudulent intent. Judges do this sorting claim by claim, so some counts in a complaint may survive while others fall.
Affirmative Defenses
Defendants can run into the same problem. Rule 12(f) allows a court to “strike from a pleading an insufficient defense or any redundant, immaterial, impertinent, or scandalous matter.”4Cornell Law School. Rule 12 – Defenses and Objections A defense that reads “plaintiff’s claims are barred by the statute of limitations,” with no mention of which statute, when the claim accrued, or why the period expired, is conclusory. Some federal courts apply the full plausibility standard to affirmative defenses; courts are not uniform on that point. Either way, a one-line defense with no factual support is exposed.
Summary Judgment Affidavits
Under Rule 56, a court grants summary judgment when “there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law.”5Cornell Law School Legal Information Institute. Rule 56. Summary Judgment Both sides must produce actual evidence. An affidavit that restates a legal conclusion without grounding it in personal knowledge and admissible evidence will not create a factual dispute. The party opposing summary judgment must respond with specific facts, not with a declaration that repeats the elements of the claim in the affiant’s own voice.
Expert Testimony
Federal Rule of Evidence 702 requires expert testimony to be “based on sufficient facts or data,” to be “the product of reliable principles and methods,” and to reflect “a reliable application of the principles and methods to the facts of the case.”6Federal Rules of Evidence. Rule 702. Testimony by Expert Witnesses An expert who states a bottom-line opinion without showing the reasoning has given conclusory testimony.
Courts call the flaw an “analytical gap,” drawing from General Electric Co. v. Joiner. A trial court can exclude expert testimony when there is “simply too great an analytical gap between the data and the opinion proffered.”6Federal Rules of Evidence. Rule 702. Testimony by Expert Witnesses Credentials alone will not carry an opinion across that gap. The reasoning has to be traceable from data to conclusion.
What Happens When a Court Calls Your Pleading Conclusory
A conclusory ruling usually does not end the case permanently. The most common outcome is dismissal without prejudice, which lets the pleader try again with more facts. Rule 15(a)(2) directs courts to “freely give leave” to amend “when justice so requires,”7Legal Information Institute. Rule 15. Amended and Supplemental Pleadings and many judges grant that leave on the first attempt. Some courts issue the dismissal and the amendment deadline together.
Patience runs out. Courts eventually dismiss with prejudice when a plaintiff amends repeatedly and still cannot cross the plausibility threshold, or when the defect is fundamental rather than a matter of missing detail. For defendants, an affirmative defense struck under Rule 12(f) may be gone if the court does not grant leave to replead.
The practical lesson runs in one direction on both sides of a case. Put the facts in the pleading the first time. Describe who did what, when, and how. Conclusory language is the most common reason filings fail at the threshold, and nothing in the current federal case law suggests that standard is loosening.