FRCP 8. General Rules of Pleading

(a) Claim for Relief. A pleading that states a claim for relief must contain:
(1) a short and plain statement of the grounds for the court's jurisdiction, unless the court already has jurisdiction and the claim needs no new jurisdictional support;
(2) a short and plain statement of the claim showing that the pleader is entitled to relief; and
(3) a demand for the relief sought, which may include relief in the alternative or different types of relief.

(b) Defenses; Admissions and Denials.
(1) In General. In responding to a pleading, a party must:
(A) state in short and plain terms its defenses to each claim asserted against it; and
(B) admit or deny the allegations asserted against it by an opposing party.
(2) Denials—Responding to the Substance. A denial must fairly respond to the substance of the allegation.
(3) General and Specific Denials. A party that intends in good faith to deny all the allegations of a pleading—including the jurisdictional grounds—may do so by a general denial. A party that does not intend to deny all the allegations must either specifically deny designated allegations or generally deny all except those specifically admitted.
(4) Denying Part of an Allegation. A party that intends in good faith to deny only part of an allegation must admit the part that is true and deny the rest.
(5) Lacking Knowledge or Information. A party that lacks knowledge or information sufficient to form a belief about the truth of an allegation must so state, and the statement has the effect of a denial.
(6) Effect of Failing to Deny. An allegation—other than one relating to the amount of damages—is admitted if a responsive pleading is required and the allegation is not denied. If a responsive pleading is not required, an allegation is considered denied or avoided.

(c) Affirmative Defenses.
(1) In General. In responding to a pleading, a party must affirmatively state any avoidance or affirmative defense, including:
• accord and satisfaction;
• arbitration and award;
• assumption of risk;
• contributory negligence;
• duress;
• estoppel;
• failure of consideration;
• fraud;
• illegality;
• injury by fellow servant;
• laches;
• license;
• payment;
• release;
• res judicata;
• statute of frauds;
• statute of limitations; and
• waiver.
(2) Mistaken Designation. If a party mistakenly designates a defense as a counterclaim, or a counterclaim as a defense, the court must, if justice requires, treat the pleading as though it were correctly designated, and may impose terms for doing so.

(d) Pleading to Be Concise and Direct; Alternative Statements; Inconsistency.
(1) In General. Each allegation must be simple, concise, and direct. No technical form is required.
(2) Alternative Statements of a Claim or Defense. A party may set out 2 or more statements of a claim or defense alternatively or hypothetically, either in a single count or defense or in separate ones. If a party makes alternative statements, the pleading is sufficient if any one of them is sufficient.
(3) Inconsistent Claims or Defenses. A party may state as many separate claims or defenses as it has, regardless of consistency.

(e) Construing Pleadings. Pleadings must be construed so as to do justice.