Empiricism
Throughout the book, Popper stresses the idea that empiricism is the most accepted philosophical theory by scientists. It argues that all knowledge stems from a sensory experience. It argues that empirical evidence is only seen via ideas and concepts rather than innate traditions.
Science
The book argues that a theory must be scientifically tested in order to be accepted – if it is unable to be tested then it cannot be truly scientifically acceptable. Popper brings in the concept that without theories being tested, inferences may come in the way and bias the results.
Learning from mistakes
As a message to take from the book, Popper argues that in order to continue seeking truth in knowledge, we must see the evidence that is already there. In this way, scientists can hope to learn from the mistakes they have made and go through more stringent process to verify and further test the evidence.
