[SIGCIS-Members] Virtuality versus transprency -- trying to locate a quote about the difference

[mariann unterluggauer]

On Oct 30, 2014, at 3:24 PM, hemmendd at union.edu (David Hemmendinger) wrote:

>> I heard it from Mike Williams, when he had his professor of computer science hat on! Here's how he said it:
>> 
>> If it is there, but you can't see it, it is transparent.
>> If it isn't there, but you see it, it is virtual.
>> If it is there, and you see it, it is real.
>> 
>> For the purposes of symmetry, what if something is not there and you can't see it?
> 
> 	If it isn't there and you can't see it, you're ok.

than you call it  "physical zero-knowledge": today it is already sufficient to imagine that something is/might be there.
best,
mariann

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