Proof by Cases/Proof Rule/Technical Note

Technical Note on
When invoking  in a tableau proof, use the ProofByCases template:



where:
 * is the number of the line on the tableau proof where 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 where the disjunction being eliminated is situated
 * is the start line of the block of the tableau proof upon which the demonstration of the first disjunct directly depends
 * is the end line of the block of the tableau proof upon which the demonstration of the first disjunct directly depends
 * is the start line of the block of the tableau proof upon which the demonstration of the second disjunct directly depends
 * is the end line of the block of the tableau proof upon which the demonstration of the second disjunct directly depends