On 28/12/2012, at 23:07, Vincent Aravantinos <[email protected]> 
wrote:

> Le 27/12/12 06:55, Ramana Kumar a écrit :
>> Do you have a clone of the HOL4 git repository? You could make a pull 
>> request on github after adding HINT_EXISTS_TAC in an appropriate place.
> 
> I'd totally be ready to do this, but I would like, first of all, to be sure 
> people share my interest in the features of HINT_EXISTS_TAC: I don't want to 
> pollute the repo with new tactics that I am the only one to find useful.

> In particular, it seems from this discussion that there are several "close" 
> solutions in HOL4.
> However, none of them allows to just make progress in a goal without solving 
> it completely.
> In my opinion, that's an essential aspect of HINT_EXISTS_TAC, but I'm not 
> sure this opinion is shared by any of you guys? :-)

I think my first reaction to a clean implementation with test cases (in a 
selftest.sml file, say) and documentation (a .doc file) would be to accept 
first and ask questions later.  If it turns out that something really is 
redundant or otherwise unloved given other facilities in the system it can 
always be removed.

Michael
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