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Re:Why 2015 Was a Breakthrough Year in Artificial Intelligence by rdancer on Saturday January 02, 2016 @08:40AM (#10826152)
For example echolocation (in humans, not bats) is done in visual cortex[1]. Visual cortex shows activity during dreams and imagination. Blind people do use their visual cortex.

[1] Sorry, don't have a cite, but there are a lot of results on Google talking about it: https://archive.is/iDE27

Re:Why 2015 Was a Breakthrough Year in Artificial Intelligence by DonaldFisk on Saturday January 02, 2016 @08:53AM (#10826177)
This doesn't surprise me. They are using their visual cortex to process sensory data (auditory images) which substitute for sight.