I think you can just write

510:,,500:syl2anc
or
510:500,,:syl2anc

for that.

On Wed, Jan 8, 2020 at 10:51 AM Jim Kingdon <[email protected]> wrote:

> On 1/8/20 5:01 AM, Mario Carneiro wrote:
>
> > I would have completely removed the "?" but it breaks a lot of
> > backward compatibility. It is currently only useful for the "step
> > search": if you double click on "step:: |- foo" then it will search
> > only for proofs of |- foo with no assumptions, and if you double click
> > "step:?: |- foo" it will search for proofs of foo with possibly
> > additional hypotheses.
>
> The ? is still useful in telling mmj2 which hypotheses to fill in. For
> example, if I have a step 500 and I want to say
>
> 510:500:syl2anc
>
> and have mmj2 fill in the other two hypotheses. Before typing control-U
> I can modify that to be:
>
> 510:?,?,500:syl2anc
>
> or
>
> 510:500,?,?:syl2anc
>
> before writing unify.
>
> I just tried this with mmj2 2.5.3 as of 23-Sep-2019 (as reported in the
> About box).
>
>
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