Hal Clement's "Blot" (novelette, first contact): When Asimovian robots failed to distinguish "human" from "robot"

While there are many stories featuring robots that don't follow any "laws", the ones that feature "laws" seem to be almost exclusively about Asimov's 3 laws. Besides "Blot", I can off-hand recall only 2 stories that have laws-following robots but laws aren't Asimov's:

1. One of Asimov's own Spacer novels where robots are tweaked to recognize only some people as human - I think by recognizing the accent of their voice.
2. Jack Williamson's "With Folded Hands" (download MP3): A single law is enough!

This story has a twist on Asimov's laws: "Human" is defined as anything sentient & biological. In fact, some of the robots are of alien origin. It's their confusion on first contact with humanity that makes them label women as "human" & men as "robots" (or was it based on dress color? It's been some months since I read this.) So killing men is fair game.

Story summary.

First human expedition to Miranda, one of the moons of Uranus, comes across alien artifacts & alien (but humanoid-looking) robots guarding/handling them. Humans' curiosity trying to figure out artifacts & nature of robots provides some excitement in the story, & near death of a crew member at the hands of a robot. But all ends well.

Fact sheet.

First published: Martin Greenberg (ed)'s "Stories in Honor of Isaac Asimov: Foundation's Friends" (anthology, 1989).
Rating: A.
Related: Stories of Hal Clement.