By your description (I haven't seen the test) it seems like SDO is a test for "nonapples".
(It is not round? Is it not red? Is it not a fruit? Be aware, you may have found a nonapple! People sometimes say that nonapples are useful and necessary, but we have clearly documented examples where nonapples have exploded, damaged property, or even killed people.)
It's in the linked wiki, but yes.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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