Crossword clues for More than not sure about 4 letters:SUREWhy, certainly!SUREDeterminedSUREA likely story...SUREOK, whateverSUREI betSUREIntro for -footed or -handedSUREDoubt-freeSUREBe glad toSURESign me upSUREBan rivalSURENatchSUREYeah, why not?SUREResoluteSUREI guess ...SUREConfidentSURECinchedSUREFree of doubtSUREOkaySURETrustworthySUREAbsolutely!SUREArrid competitorSURESuffering no doubtSURECockySURE__-footedSUREOf courseSUREYeah, right!SUREUnfailingSUREHaving nary a doubtSUREUnerringSUREFine by me ...SUREGlad to!SUREAlways effectiveSUREBeyond questionSURECasual affirmativeSURESee 19-AcrossSUREBrand with a "Raise your hand" ad campaignSUREWithout a doubtSUREPositiveSUREYou bet!SURELet's do itSURENo prob!SUREWindows or Mac operatorSURECertainly!SURENo problemSUREConfident (Tribute #6)SUREDoubtlessSUREDismissive comment, when said a certain waySUREWhy the hell notSUREWhy not?SUREWilling reply