confident

having or marked by confidence or assurance; "a confident speaker"; "a confident reply"; "his manner is more confident these days"; "confident of fulfillment"

persuaded of; very sure; "were convinced that it would be to their advantage to join"; "I am positive he is lying"; "was confident he would win"

not liable to error in judgment or action; "most surefooted of the statesmen who dealt with the depression"- Walter Lippman; "demonstrates a surefooted storytelling talent"- Michiko Kakutani