[postgis-users] st_centroid Points not on Polygon

[Sufficool, Stanley]

I'm sure I ran across this in the forums a year ago, but:
 
Is the st_centroid function guaranteed to return a point that lies on
the polygon? I have instances when my display doe not place it on the
polygon when using st_centroid(st_intersection(the_geom, <WKT BBOX>));
 
Thanks in advance.
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