Principle of Non-Contradiction/Proof Rule/Technical Note
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Technical Note on Principle of Non-Contradiction
When invoking the Principle of Non-Contradiction in a tableau proof, use the {{NonContradiction}}
template:
{{NonContradiction|line|pool|first|second}}
or:
{{NonContradiction|line|pool|first|second|comment}}
where:
line
is the number of the line on the tableau proof where the Principle of Non-Contradiction is to be invokedpool
is the pool of assumptions (comma-separated list)first
is the first of the two lines of the tableau proof upon which this line directly dependssecond
is the second of the two lines of the tableau proof upon which this line directly dependscomment
is the (optional) comment that is to be displayed in the Notes column.