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.
When a person, charged with a crime, proves (se cadem die fuisse alibi) that he was, at the time alleged, in a different place from that in which it was committed, he is said to prove an alibi, the effect of which is to lay a foundation for the necessary inference, that he could not have committed it.