Although the Chinese couldn't tell anyone exactly what an earthquake measured on the Richter scale (since the Richter scale wasn't created until 1935), they did manage to invent the world's first earthquake detector -- a seismograph.
WHAT IS AN ALIBI? An alibi is any evidence showing that a citizen accused of a crime was somewhere other than at the scene of a crime when the crime occurred. While T.V. and movies often portray the alibi as a fraudulent and untruthful, in the real world, the alibi is a perfectly respectable legal defense.
If an alibi defense is based on witness testimony, the credibility of the witness can strengthen or weaken the defense dramatically. The jury or the judge deciding whether the defendant is guilty needs to believe and trust the witness who is testifying that the defendant was not at the scene of the crime.