Two Important Navigational Technologies, the Magnetic Compass and the Astrolabe

question 30

Multiple Choice

Two important navigational technologies, the magnetic compass and the astrolabe,

• A) were invented by Henry the Navigator.
• B) were invented by Columbus.
• C) were of Italian origin.
• D) were held by an exclusive English patent.
• E) were of Chinese and Arab or Greek origin, respectively.

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Definitions:

Unstated Premise

An implicit assumption in an argument that is not explicitly expressed but is necessary for the argument's logic.

V-8 Engine

A type of engine configuration with eight cylinders arranged in a V shape, known for its power and performance, commonly used in cars and trucks.

Unstated Conclusion

A conclusion that is implied or suggested in an argument but not explicitly expressed.

Subject Term

In logic, the term about which something is being asserted in the premise of a categorical syllogism.