Sentence:  We must avoid the notion , suggested to some people by examples such as those just mentioned , that ideas are `` units '' in some way comparable to <WSD>coins</WSD> or counters that can be passed intact from one group of people to another or even , for that matter , from one individual to another . 
Meaning of the word marked with <WSD> tags:  a flat metal piece (usually a disc) used as money