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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | \DOC DISJ2
\TYPE {DISJ2 : (term -> thm -> thm)}
\SYNOPSIS
Introduces a left disjunct into the conclusion of a theorem.
\KEYWORDS
rule, disjunction.
\DESCRIBE
{
A |- t2
--------------- DISJ2 "t1"
A |- t1 \/ t2
}
\FAILURE
Fails if the term argument is not boolean.
\EXAMPLE
{
#DISJ2 "F" TRUTH;;
|- F \/ T
}
\SEEALSO
DISJ1, DISJ1_TAC, DISJ2_TAC, DISJ_CASES.
\ENDDOC
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