Changes

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{| align="center" cellpadding="12" cellspacing="0" style="border-top:1px solid black; border-bottom:1px solid black" width="90%"

{| align="center" cellpadding="2" 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%"

|-

|- style="height:40px"

| align="left" style="border-left:1px solid black" width="20%" | &nbsp;

| width="2%" | &nbsp;

| align="left" width="60%" | &nbsp;

| width="18%" | &nbsp;

| align="right" style="border-right:1px solid black" width="20%" | <math>\text{Rule 2}\!</math>

| width="60%" | &nbsp;

|-

| align="center" width="20%" | <math>\text{Rule 2}\!</math>

| style="border-left:1px solid black; border-top:1px solid black" | <math>\text{If}\!</math>

|- style="height:40px"

| style="border-top:1px solid black" | &nbsp;

| style="border-top:1px solid black" | <math>\text{If}\!</math>

| style="border-top:1px solid black" | <math>f : X \to \underline\mathbb{B}</math>

| style="border-top:1px solid black" | <math>f : X \to \underline\mathbb{B}</math>

| style="border-right:1px solid black; border-top:1px solid black" | &nbsp;

| style="border-top:1px solid black" | &nbsp;

|-

|- style="height:40px"

| style="border-left:1px solid black" | <math>\text{and}\!</math>

| <math>\text{and}\!</math>

| <math>x \in X</math>

| <math>x \in X</math>

| style="border-right:1px solid black" | &nbsp;

| &nbsp;

|-

|- style="height:40px"

| style="border-left:1px solid black" | <math>\text{then}\!</math>

| <math>\text{then}\!</math>

| <math>\text{the following are equivalent:}\!</math>

| <math>\text{the following are equivalent:}\!</math>

| style="border-right:1px solid black" | &nbsp;

| style="border-left:1px solid black; border-top:1px solid black" | <math>\text{R2a.}\!</math>

| style="border-top:1px solid black" | &nbsp;

| style="border-top:1px solid black" | <math>\text{R2a.}\!</math>

| style="border-top:1px solid black" | <math>f(x)\!</math>

| style="border-top:1px solid black" | <math>f(x)\!</math>

| style="border-right:1px solid black; border-top:1px solid black" | &nbsp;

| style="border-top:1px solid black" | &nbsp;

|-

|- style="height:40px"

| style="border-left:1px solid black" | <math>\text{R2b.}\!</math>

| <math>\text{R2b.}\!</math>

| <math>f(x) = \underline{1}</math>

| <math>f(x) = \underline{1}</math>

| style="border-right:1px solid black" | &nbsp;

| &nbsp;

|}

|}