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→‎Definition 6: format + reformulate a bit
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===Definition 6===
 
===Definition 6===
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<pre>
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<br>
Definition 6
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If Sj is a sentence
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{| align="center" cellpadding="0" cellspacing="0" style="border-left:1px solid black; border-top:1px solid black; border-right:1px solid black; border-bottom:1px solid black" width="90%"
about things in the universe U,
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|
for all j C J,
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{| align="center" cellpadding="0" cellspacing="0" width="100%"
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|- style="height:40px; text-align:center"
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| width="80%" | &nbsp;
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| width="20%" | <math>\text{Definition 6}\!</math>
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|}
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|-
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|
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{| align="center" cellpadding="0" cellspacing="0" width="100%"
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|- style="height:60px"
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| width="2%"  style="border-top:1px solid black" | &nbsp;
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| width="18%" style="border-top:1px solid black" | <math>\text{If}\!</math>
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| width="80%" style="border-top:1px solid black" |
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<p><math>s_j ~\text{is a sentence about things in the universe}~ X</math></p>
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<p><math>\text{for each}~ j \in J</math></p>
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|- style="height:40px"
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| &nbsp;
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| <math>\text{then}\!</math>
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| <math>\text{the following are equivalent:}\!</math>
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|}
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|-
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|
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{| align="center" cellpadding="0" cellspacing="0" width="100%"
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|- style="height:40px"
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| width="2%"  style="border-top:1px solid black" | &nbsp;
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| width="18%" style="border-top:1px solid black" | <math>\operatorname{D6a.}</math>
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| width="80%" style="border-top:1px solid black" | <math>s_j, ~\operatorname{for~all}~ j \in J</math>
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|- style="height:40px"
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| &nbsp;
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| <math>\operatorname{D6b.}</math>
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| <math>\forall_{j \in J} s_j</math>
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|- style="height:40px"
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| &nbsp;
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| <math>\operatorname{D6c.}</math>
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| <math>\forall_j^J s_j</math>
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|- style="height:40px"
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| &nbsp;
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| <math>\operatorname{D6d.}</math>
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| <math>\operatorname{Conj}_{j \in J} s_j</math>
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|- style="height:40px"
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| &nbsp;
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| <math>\operatorname{D6e.}</math>
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| <math>\operatorname{Conj}_j^J s_j</math>
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|}
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|}
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then the following are equivalent:
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<br>
 
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D6a. Sj, for all j C J.
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D6b. For all j C J, Sj.
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D6c. Conj(j C J) Sj.
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D6d. ConjJ,j Sj.
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D6e. ConjJj Sj.
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</pre>
      
===Definition 7===
 
===Definition 7===
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