Invention

An invention is a novel device or technique.

One question that society often asks is, "What conditions lead to the
development of an invention?" There are two main opposing viewpoints on
this; one school of thought argues that a lack of resources leads people to
invent, whereas, the other school of thought argues that only an excess of
resources will result in inventions.

Castles in the air (or castles in Spain) are creative ideas which cannot be
created due to more earthly considerations. The history of invention is full
of such castles, as inventions aren't neccessarily invented in the order
that is most useful. The design of the parachute was worked out before the
invention of powered flight.

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In music, an invention is a a short composition for (usually for a keyboard
instrument) with two or three part counterpoint.

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