Template:NonContradiction

Include this template to insert a complete row into a tableau proof at the point at which an instance of the Principle of Non-Contradiction is to be invoked.

This always places a $\bot$ in the flow of the argument, so there is no need to specify the statement.

Usage
This template can be invoked as:

or:

where:
 * is the number of the line on the tableau proof where the Principle of Non-Contradiction is to be invoked
 * is the pool of assumptions (comma-separated list)
 * is the first of the two lines of the tableau proof upon which this line directly depends
 * is the second of the two lines of the tableau proof upon which this line directly depends
 * is the (optional) comment that is to be displayed in the Notes column.

|-
 * align="right" | ||
 * align="right" |
 * $\bot$
 * Principle of Non-Contradiction: $\neg \mathcal E$