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Logic II 4

offers an elaborate index raisonné as a substitute for an alphabetical
arrangement although yet no arrangement can be worse
that an alphabetical one for any other more rational purpose. The 146
systems mentioned above as dealt with in Dr. Richardson's
book do not include classifications for the purpose of
reference to a library of which he gives adds a separate catalogue of 173
systems. The 146, like the classification which we desire,
were given as having each a scientific value, 00 as
being the one true and natural classification. The first
question, then, that is seems well to consider (remembering
that the [subjective?] classification is one of the topics
of logic to be dealt with more scientifically in its proper
place, and that I can have only skim the surface of
it) is, what is meant by a true and natural class?
A great many logicians say there is no such thing; and,
what is strange, even many students of taxonomic sciences
not only follow this opinion, but allow it a great

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