SORU: aşağıdaki parçaya göre cevaplayınız
The point made in the passage is that theories are subject to revision or may lose their validity
A scientific view of something is always an intimate
mixture of theories and observed facts. The theories are
broad, general ideas together with arguments based on
them. The arguments are designed to show that, if the
general ideas are accepted, then this or the other thing
ought to be observed. If this, that, or the other actually is
observed, then the theory is a good one; if not, then the
theoreticians have to think again. Thus, theoretical ideas
and arguments are continually subjected to the severe
test of comparison with the facts, and scientists are proud
of the strictness with which this is done. On the other
hand, theories often suggest new things to look for; in other
words, they lead to predictions. These predictions are
frequently successful, and scientists are entitled to be
proud of that, too. But it follows that no theory is
immutable; any scientific view of any subject may, in
principle, be invalidated at any time by the discovery of
new facts.