<div dir="auto"><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Thu, Jun 4, 2020, 2:10 PM Gershom B <<a href="mailto:gershomb@gmail.com">gershomb@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div name="messageBodySection">
<div dir="auto">I think that the counterexample I linked should be enough to rule out any instance for monad, in fact, in conjunction with the fact that to make liftA2 (,) correspond to zip, we need to have the join operation result in something which is the minimum of the length of the enclosing ziplist and all “enclosed” ziplists. <br></div></div></div></blockquote></div><div dir="auto"><br></div><div dir="auto">That's not so obvious to me. We know what has to happen for very specific shapes, but how do you know which features of that extend to general shapes?</div><div class="gmail_quote" dir="auto"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div name="messageBodySection"><div dir="auto"></div></div>
</div>
</blockquote></div></div>