# 1 <br/>Only the power of X, rather than Y, could help.<br/><br/>In the above, is it necessary that we say: Only the power X, rather than<b> that of </b>Y, could help. Is 'that of' necessary imply that it is the power Y?<br/><br/>#2<br/><br/>His teaching might encourage him to drift along the river rather than to swim.<br/><br/>Is it okay to use <b>rather</b> in this manner?