From @NISC.NYSER.NET:kumar@ira.uka.de  Wed Oct 25 09:38:19 1989
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Date:     Tue, 24 Oct 89 9:40:24 MET
From: Ramayya Kumar <kumar@ira.uka.de>
To: info-hol@CLOVER.UCDAVIS.EDU
Subject:  Teething Troubles with HOL


Dear HOL-users,
I am new to hol and am running into some problems in running some of the
examples given in the paper "HOL - A Proof Generating System for Higher-Order
Logic". A copy of the session is given below. I would like to know if I
have not installed my system correctly or if it is some other error. I have
not respected the warning that is given in the READMe file which says that
it is frustrating in the hands of a novice. I still plan to work my way
through it. Thanks in advance.

***********************************************************************
#let th1 = ASSUME "t1 ==> t2";;
th1 = . |- t1 ==> t2

#let th2 = UNDISCH th1;;
th2 = .. |- t2

#DISCH "t1 ==>t2" (DISCH "t1" th2);;
Indeterminate types:  "t1:?"

evaluation failed     types indeterminate in quotation
***********************************************************************

email: kumar@ira.uka.de

