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− | Applied to a given proposition ''f'', the qualifiers α<sub>''i''</sub> and β<sub>''i''</sub> tell whether ''f'' rests "above ''f''<sub>''i''</sub>" or "below ''f''<sub>''i''</sub>", respectively, in the implication ordering. By way of example, let us trace the effects of several such measures, namely, those that occupy the limiting positions of the Tables. | + | Applied to a given proposition <math>f,\!</math> the qualifiers <math>\alpha_i\!</math> and <math>\beta_i\!</math> tell whether <math>f\!</math> rests <math>\operatorname{above}\ f_i</math> or <math>\operatorname{below}\ f_i,</math> respectively, in the implication ordering. By way of example, let us trace the effects of several such measures, namely, those that occupy the limiting positions of the Tables. |
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− | | α<sub>00</sub> ''f'' = 1 | + | | <math>\alpha_{00} f = 1\!</math> |
− | | iff || ''f''<sub>00</sub> ⇒ ''f'', | + | | iff || <math>f_{00} \Rightarrow f,</math> |
− | | iff || 0 ⇒ ''f'', | + | | iff || <math>0 \Rightarrow f,</math> |
− | | hence || α<sub>00</sub> ''f'' = 1 for all ''f''. | + | | hence || <math>\alpha_{00} f = 1\ \operatorname{for~all}\ f.</math> |
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− | | α<sub>15</sub> ''f'' = 1 | + | | <math>\alpha_{15} f = 1\!</math> |
− | | iff || ''f''<sub>15</sub> ⇒ f, | + | | iff || <math>f_{15} \Rightarrow f,</math> |
− | | iff || 1 ⇒ ''f'', | + | | iff || <math>1 \Rightarrow f,</math> |
− | | hence || α<sub>15</sub> ''f'' = 1 ⇒ ''f'' = 1. | + | | hence || <math>\alpha_{15} f = 1 \Rightarrow f = 1.</math> |
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− | | β<sub>00</sub> ''f'' = 1 | + | | <math>\beta_{00} f = 1\!</math> |
− | | iff || ''f'' ⇒ f<sub>00</sub>, | + | | iff || <math>f \Rightarrow f_{00},</math> |
− | | iff || ''f'' ⇒ 0, | + | | iff || <math>f \Rightarrow 0,</math> |
− | | hence || β<sub>00</sub> ''f'' = 1 ⇒ f = 0. | + | | hence || <math>\beta_{00} f = 1 \Rightarrow f = 0.</math> |
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− | | β<sub>15</sub> ''f'' = 1 | + | | <math>\beta_{15} f = 1\!</math> |
− | | iff || ''f'' ⇒ f<sub>15</sub>, | + | | iff || <math>f \Rightarrow f_{15},</math> |
− | | iff || ''f'' ⇒ 1, | + | | iff || <math>f \Rightarrow 1,</math> |
− | | hence || β<sub>15</sub> ''f'' = 1 for all ''f''. | + | | hence || <math>\beta_{15} f = 1\ \operatorname{for~all}\ f.</math> |
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