Why not do something like THX used to do for theater sound systems? Trademark the 'official' powered-by-android phrase, run a certification program, let the vendors customize all they want -- they get to use the OS but not necessarily the 'brand'.
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I think the problem is that there's no system for publishing negatives, only a system for publishing positives. Sure, false positives slip through, but why aren't there more publications detailing the true negatives? True negatives are valuable information, from a scientific perspective. They just aren't sexy. True negatives are ignored until someone claims a false positive. Then 'unbiased media' gets involved, because there's a 'sensation'.
Seriously. One of the subsets of the Turing Test should be how the system responds to a 'typical' Maori war dance (we'll even allow the All-Blacks as performers of the ritual), without any pedagogical knowledge of the Maori.
You know, be a diplomat. Or, god forbid, a missionary. That's worked out pretty well for lots of intelligences (the human kind, of a sort).