Charlie is blue. Charlie is cold. Charlie is green. Charlie is quiet. Charlie is not red. Charlie is not white. Charlie is young. Fiona is not red. Fiona is white. Fiona is not young. Gary is quiet. Gary is not white. If something is not white then it is green. If something is white and blue then it is cold. All young, white things are quiet. If something is red then it is green. If something is not quiet then it is blue. If something is not blue then it is not young.
Fiona is blue.