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Comment Re:Eppur si muove (Score 1) 129

Not negative, complex. As in the square root of a negative number. The value 1/square_root(c^2 - v^2) would be a complex number. You would experience imaginary time. Fiction portrays this as going back in time, but the reality would no doubt be far stranger.

Or is this an extreme for which string theory or quantum gravity have a different answer?

Comment Re:Sorry (Score 1) 555

<em> and <strong> have always been a part of HTML. The idea is that you are tagging structure, not layout. Text should be emphasized, or made to look strong. <b> and <i> are layout tags, which say to use a bold font or italicized font.

<em> and <strong> are preferred since CSS 1, because best practices say you should separate presentation/layout from structure. The former should only be in CSS, while the latter are in the HTML itself.

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