See the context below. As I read two "fundamentals," somehow I got a feeling that was very boring and tired. Could you change the second "fundamental" to another word with same meaning?
Context:
Particles break light-speed limit
Neutrino results challenge cornerstone of modern physics.
Geoff Brumfiel
An Italian experiment has unveiled evidence that
fundamental particles known as neutrinos can travel faster than light. Other researchers are cautious about the result, but if it stands further scrutiny, the finding would overturn the most
fundamental rule of modern physics — that nothing travels faster than 299,792,458 metres per second.
More:
http://www.nature.com/news/2011/110922/full/news.2011.554.html