Changes

#====<math>\varphi \vdash \varphi \land \varphi</math>====<!-- --><p>{{#ev:youtube|moh07B8dv2k|||||start=583&end=636&loop=1}}</p>#====<math>\alpha \land \beta, \gamma \land \delta \vdash \gamma \land \beta</math>====<!-- --><p>{{#ev:youtube|moh07B8dv2k|||||start=637}}</p>#====<math>\alpha \to (\beta \to \gamma) \vdash \beta \to (\alpha \to \gamma)</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=579}}</p>#====<math>\vdash \alpha \to (\beta \to \alpha)</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=768}}</p>#====<math>\vdash \alpha \to \alpha</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=888}}</p>#====<math>\alpha \to \beta \vdash \alpha \to (\alpha \to \beta)</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=965}}</p>#====<math>\alpha \to (\alpha \to \beta) \vdash \alpha \to \beta</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=1015}}</p>#====<math>\gamma \to \alpha, \gamma \to \beta \vdash \gamma \to (\alpha \land \beta)</math>====<!----><p>{{#ev:youtube|mlEYLd56pMg|||||start=1098}}</p>

#====<math>\beta \lor (\alpha \land \beta) \vdash \beta</math>====<!----><p>{{#ev:youtube|yUejpYb2NgI|||||start=759}}</p>#====<math>(\alpha \lor \beta) \to \gamma \vdash (\alpha \to \gamma) \land (\beta \to \gamma)</math>====<!----><p>{{#ev:youtube|yUejpYb2NgI|||||start=850}}</p>#====<math>\alpha \lor \beta \not\vdash \alpha \land \beta</math>====<!----><p>{{#ev:youtube|yUejpYb2NgI|||||start=1231}}</p>

#====<math>\alpha \vdash \neg\neg\alpha</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=463}}</p>#====<math>\beta \to \alpha, \beta \to \neg\alpha \vdash \neg\beta</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=498}}</p>#====<math>\alpha, \neg\alpha \vdash \neg\beta</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=570}}</p>#====<math>\alpha\lor\beta, \neg\alpha\lor\gamma \vdash \beta\lor\gamma</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=596}}</p>#====<math> \alpha\to\beta \vdash \neg\beta\to\neg\alpha</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=741}}</p>#====<math>\neg(\alpha \lor \beta) \dashv\vdash \neg\alpha\land\neg\beta</math>====<!----><p>{{#ev:youtube|-Exorelokdo|||||start=817}}</p>