Sentence:  We must avoid the notion , suggested to some people by examples such as those just mentioned , that <WSD>ideas</WSD> are `` units '' in some way comparable to coins 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:  the content of cognition; the main thing you are thinking about