Mo. R. Civ. P. 55.07
If a responding party has knowledge or information sufficient to form a belief as to the truth of an averment, the party shall admit or deny the specific averment. If the responding party is without knowledge or information sufficient to form a belief as to the truth of a specific averment, the party shall so state, and this has the effect of a denial. Denials shall fairly meet the substance of the averments denied. When a party intends in good faith to deny only a part or a qualification of an averment, the party shall specify so much of it as is true and shall deny only the remainder. A party shall respond to all specific averments as provided in this Rule 55.07 and shall not generally deny all the specific averments.
Mo. R. Civ. P. 55.07