avoided if you use qdelaunay,
add option '<a href="qh-optq.htm#Qbb">Qbb</a>',
or add the origin ('P0') to the input.
<p>
<li><b>Nearly adjacent vertices within 1e-13</b> --
Multiple, nearly adjacent vertices within a 1e-13 ball in the unit cube
may lead to topological errors and wide facets.  The experimental option '<a href="qh-optq.htm#Q14">Q14</a>'
for Qhull 2019.1 merges nearly adjacent vertices to resolve dupridges.  A dupridge is a topological
error where multiple facets meet at the same ridge.  Furth