# De Morgan's Laws (Logic)/Technical Note

## Technical Note on De Morgan's Laws

When invoking De Morgan's Laws in a tableau proof, use the {{DeMorgan}} template:

{{DeMorgan|line|pool|statement|depends|type}}

where:

line is the number of the line on the tableau proof where the specific instance of De Morgan's Laws is to be invoked
pool is the pool of assumptions (comma-separated list)
statement is the statement of logic that is to be displayed in the Formula column, without the $...$ delimiters
depends is the line (or lines) of the tableau proof upon which this line directly depends
type is the type of De Morgan's Law: Disjunction, Conjunction, Disjunction of Negations or Conjunction of Negations, whose link will be displayed in the Notes column.