Consider the premise. Does the hypothesis stand independently without contradicting or following it? Premise: A picture-restorer is  one who cleans and restores and sometimes ruins old pictures.  Hypothesis: Old pictures can be given to a picture-restorer to be cleaned or possibly ruined.
A picture-restorer is  one who cleans and restores and sometimes ruins old pictures. ###Old pictures can be given to a picture-restorer to be cleaned or possibly ruined.