Although there are some theoretical problems analysing the operations in combination, the bias can be detected experimentally for the entire cipher.
In other words, all our actual knowledge of a physical object is based on, at least in principle, the experimentally detected relationships between the object and a suitable detector.
Shortly after, superconductivity was experimentally detected in germanium telluride.
The transmission of a nerve impulse and the contraction of muscle are relatively easily detected and quantified experimentally.
Recently, statistics of each post-translational modification experimentally and putatively detected have been compiled using proteome-wide information from the Swiss-Prot database.
Is it any wonder the decay's never been detected experimentally?
Lorentz in 1892, and was eventually detected experimentally by J.J. Thomson and others later that decade.
Indeed, the protein folding intermediates and the partially folded transition states were experimentally detected, which explains the fast protein folding.
This supercurrent will of course induce a magnetic field which can be detected experimentally.
The current due to each electron can be directly detected experimentally.