Template:DoubleNegIntro

Include this template to insert a complete row into a tableau proof at the point at which an instance of Double Negation Introduction is to be invoked.

Usage
This template can be invoked as:

or:

where:
 * is the number of the line on the tableau proof where Double Negation Introduction is to be invoked
 * is the pool of assumptions (comma-separated list)
 * is the statement of logic that is to be displayed in the Formula column, without the  delimiters
 * is the line 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" |
 * Double Negation Introduction: $\neg \neg \mathcal I$
 * Double Negation Introduction: $\neg \neg \mathcal I$