Context: Popper coined the term "critical rationalism" to describe his philosophy. Concerning the method of science, the term indicates his rejection of classical empiricism, and the classical observationalist-inductivist account of science that had grown out of it. Popper argued strongly against the latter, holding that scientific theories are abstract in nature, and can be tested only indirectly, by reference to their implications. He also held that scientific theory, and human knowledge generally, is irreducibly conjectural or hypothetical, and is generated by the creative imagination to solve problems that have arisen in specific historico-cultural settings.

Question: What term did Popper use for his philosophy?
Answer: critical rationalism

Question: Which account of scientific method did Popper's repudiate?
Answer: the classical observationalist-inductivist account

Question: What was Popper's position on classical empiricism?
Answer: rejection

Question: According to Popper, what is the only way one can test scientific theories because they are necessarily abstract?
Answer: indirectly

Question: What term did Einstein term to describe his philosophy? 
Answer: Unanswerable

Question: What does critical rationalism embrace?
Answer: Unanswerable

Question: What did Popper think was concrete in nature?
Answer: Unanswerable

Question: What did Popper think could be tested only directly?
Answer: Unanswerable

Question: Who argued in favor of the classical observationalist-inductivist account of science?
Answer: Unanswerable