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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 29 30 31 | \DOC DISJ1
\TYPE {DISJ1 : (thm -> term -> thm)}
\SYNOPSIS
Introduces a right disjunct into the conclusion of a theorem.
\KEYWORDS
rule, disjunction.
\DESCRIBE
{
A |- t1
--------------- DISJ1 (A |- t1) "t2"
A |- t1 \/ t2
}
\FAILURE
Fails unless the term argument is boolean.
\EXAMPLE
{
#DISJ1 TRUTH "F";;
|- T \/ F
}
\COMMENTS
The system shows the type of {DISJ1} as {(thm -> conv)}.
\SEEALSO
DISJ1_TAC, DISJ2, DISJ2_TAC, DISJ_CASES.
\ENDDOC
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