Biconditional Introduction/Proof Rule/Technical Note

Technical Note on Biconditional Introduction

When invoking Biconditional Introduction in a tableau proof, use the {{BiconditionalIntro}} template:

{{BiconditionalIntro|line|pool|statement|first|second}}

or:

{{BiconditionalIntro|line|pool|statement|first|second|comment}}

where:

line is the number of the line on the tableau proof where Biconditional Introduction is to be invoked

pool is the combined pool of assumptions of each of the constituents (comma-separated list)

statement is the statement of logic that is to be displayed in the Formula column, without the $ ... $ delimiters

first is the first of the two lines of the tableau proof upon which this line directly depends

second is the second of the two lines of the tableau proof upon which this line directly depends

comment is the (optional) comment that is to be displayed in the Notes column.