I once read someone say:
Beyond just songs and faces, I believe that everything we remember is stored and accessed by certain key attributes which we distill out of the memory. When items are stored and retrieved based on a subset of their actual properties, it likely that some differing items will result in the same key properties. The likelihood of such a 'collision' increases as the more you try to distill down the items into fewer and fewer key properties.
What a crock!
In Safari, the above code is correctly rendered as: