Answer:
The correct words that fill the sentence are:
- According to the principle of verification, sentences are meaningful if they can be assessed by empirical observation.
Explanation:
The Vienna circle for the scientific conception of the world or just Vienna circle was a philosophical organism created in 1921 by Moritz Schlick, whose philosophical position was called neopositivism or logical empiricism, they were looking the scientific explanation of the statements from the point of view of philosophy, so, they created the principle of verification, which argues that "the only way to verify the veracity of a statement is by empirical observation", bypassing other methods such as metaphysics.
