− | This is apparently a stock example of inductive reasoning that Peiece borrows from traditional discussions, so let us pass over the circumstance that modern taxonomies may classify swine as omniverous. | + | This is apparently a stock example of inductive reasoning that Peirce borrows from traditional discussions, so let us pass over the circumstance that modern taxonomies may classify swine as omniverous. |
| In view of the analogical symmetries that the disjunctive term shares with the conjunctive case, I think that we can run through this example in fairly short order. We have an aggregation over four terms: | | In view of the analogical symmetries that the disjunctive term shares with the conjunctive case, I think that we can run through this example in fairly short order. We have an aggregation over four terms: |
− | In a similar but dual fashion to the preceding consideration, there is a gap between the the logical disjunction ''u'', in lattice terminology, the ''least upper bound'' (''lub'') of the disjoined terms, ''u'' = ''lub''{''s''<sub>''j''</sub> : ''j'' = 1 to 4}, and what we might regard as the "natural disjunction" or the "natural lub", namely, ''v'' = ''cloven-hoofed''. | + | In a similar but dual fashion to the preceding consideration, there is a gap between the the logical disjunction <math>u,\!</math> in lattice terminology, the ''least upper bound'' (''lub'') of the disjoined terms, <math>u = \operatorname{lub} ( \{ s_j : j = 1 ~\text{to}~ 4 \}),</math> and what we might regard as the "natural disjunction" or the "natural lub", namely, <math>v = \text{cloven-hoofed}.\!</math> |
− | Once again, the sheer implausibility of imagining that the disjunctive term ''u'' would ever be embedded exactly per se in a lattice of natural kinds, leads to the evident ''naturalness'' of the induction to ''v'' ⇒ ''w'', namely, the rule that cloven-hoofed animals are herbivorous. | + | Once again, the sheer implausibility of imagining that the disjunctive term <math>u\!</math> would ever be embedded exactly as such in a lattice of natural kinds, leads to the evident ''naturalness'' of the induction to <math>v \Rightarrow w,</math> namely, the rule that cloven-hoofed animals are herbivorous. |