<div dir="ltr"><div>I believe `p-nil` is to be understood as representing whatever proof you would give when</div><div>proving a concrete property `P`, and not meant as a literal example. That said, to fix the</div><div>yellow you need to provide the type argument A:</div><div><br></div><div>postulate p-nil : ∀ {A} -> P {A} []</div><div><br></div><div>/ Ulf<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 4, 2018 at 4:05 AM, rick <span dir="ltr"><<a href="mailto:rick@rickmurphy.org" target="_blank">rick@rickmurphy.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
First thanks for all the great work on Agda.<br>
<br>
There appears to be an unsolved meta in the with abstraction Generalization example here [1].<br>
<br>
Given<br>
<br>
postulate P : ∀{A} -> List A -> Set<br>
<br>
the property P is yellow in the p-nil postulate.<br>
<br>
postulate p-nil : P {!!}<br>
<br>
after only one step of refinement. It remains so in the next step P [].<br>
<br>
I am using release 2.5.3 and found no issues here [2].<br>
<br>
Could you please explain how to resolve?<br>
<br>
I am new to Agda, so I'm sure I've missed something.<br>
<br>
Thanks in advance.<br>
<br>
<br>
1. <a href="http://agda.readthedocs.io/en/v2.5.2/language/with-abstraction.html" rel="noreferrer" target="_blank">http://agda.readthedocs.io/en/<wbr>v2.5.2/language/with-abstracti<wbr>on.html</a><br>
<br>
2. <a href="https://github.com/agda/agda/issues" rel="noreferrer" target="_blank">https://github.com/agda/agda/i<wbr>ssues</a><span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
-- <br>
rick<br>
<br>
-- <br>
rick<br>
<br>
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