When there is no agreement and there is a disagreement that results in a lawsuit, mediation or arbitration. A conflict or controversy; a conflict of claims or rights; an assertion of a right, claim, or demand on one side, met by contrary claims or allegations on the other. Slaven v. Wheeler, 58 Tex. 25; Keith v. Levi (C. C.) 2 Fed. 745; Ft. Pitt Gas Co. v. Borough of Sewickley, 198 Pa. 201, 47 Atl. 957; Railroad Co. v. Clark, 92 Fed. 968, 35 O. C. A. 120. Disputable presumption. A presumption of law, which may be rebutted or disproved. See PRESUMPTIONS. Matter in dispute. The subject of litigation; the matter for which a suit is brought and upon which issue is joined, and in relation to which jurors are called and witnesses examined. Lee v. Watson, 1 Wall. 339. 17 L. Ed. 557; Smith v. Adams, 130 U. S. 167, 9 Sup. Ct 566, 32 L. Ed. 965.