COLUMBUS — Ohio State head coach Ryan Day faced some tough questions on Tuesday during his first full media appearance since the Buckeyes’ loss to Oregon on Oct. 12. One of them: Does Day still have confidence in Jim Knowles and the Ohio State defensive coaching staff? Day made sure to express his confidence in the unit — and especially Knowles — despite the struggles against the Ducks. “I go in the meeting and I have hard conversations with everybody and I know what the plan is moving forward and I’m involved in that plan,” Day said Tuesday. “I got confidence in all those guys on that side of…