Note that different people have different research approaches. The two old ladies check that none of them can see herself and the problem is solved! ;-)
The other older lady makes an experiment with motion and rigorously determines that she is ... well ... unsichtbar. :-)
Other Interesting arXiv Papers (Week Ending 18 May 2013)
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The best of the rest from the Physics arXiv preprint server
Performance of a Remotely Located Muon Radiography System to Identify the
Inner Structure of ...
1 day ago
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