Sentence:  The deepest philosophical divide among Wikipedians is between the <WSD>inclusionists</WSD> (editors believing that Wikipedia, as a digital resource, should not be limited by traditional encyclopedia constraints and should cover as wide an array of topics as possible) and the exclusionists (editors believing that Wikipedia should apply criteria about the notability of described phenomena as strictly as any other  encyclopedia and that the virtue of sensible exclusion increases the project's quality). 
Meaning of the word marked with <WSD> tags:  A person who expresses inclusionist sentiments.