<span>The three main principles of faith in Judaism
are belief in a single, incorporeal and eternal god who created the
entire universe; a set of moral principles that require people to treat
one another with dignity and love, and ensure justice and equality; and
the worship of a single god in prayer</span>
I think the word you're looking for is "hypothesis".
For example, a hypothesis could be "dogs drink more often when owners are present".
And then this can be proven (or dis-proven) by an observation (or in this case rather: measurement).
By the end of the 18th century, Britain was the most advanced country in
Europe. The 19th century saw the spread of the Industrial Revolution.
Other European countries acquired the tools and skills needed to
revolutionise their economies. The United States also underwent an
industrial revolution in the 19th century.
Answer:
He reduces national debt and government spending
Explanation: