# Is `token` accepted by this index?
	#
	# See `whitelist_pos` and `blacklist_pos`.
	fun accept_token(token: NLPToken): Bool do
		var pos = token.pos
		if whitelist_pos.not_empty and not whitelist_pos.has(pos) then return false
		if blacklist_pos.has(pos) then return false
		if stoplist.has(token.lemma) then return false
		return true
	end