Epistemology does not just blindly question everything; instead, it seeks to understand the nature of knowledge itself. It investigates the factors which distinguish our beliefs to be true or false, reliable or unreliable. Epistemologists often ask questions like 'What distinguishes justified belief from mere opinion?' and 'How do various sources of knowledge, such as perception, memory, and evidence, contribute to forming our beliefs?'

To illustrate the depth of epistemology, let’s consider the concept of justification. Imagine you walk into a room and see a table with a red apple on top of it. Your eyes perceive the apple as red, your brain processes this information, and you form a belief that the apple is red. Is your belief justified? Epistemologists would argue that your perception, as long as it was not distorted (e.g., by an illusion or hallucination), provides justification for your belief.

But, let's say you enter another room and see an identical table with another apple. This time, you find out that the apple is actually green and that a clever trick of lighting had made it appear red. Your previously justified belief has now been revealed to be false. This example demonstrates that while justification can be a good indicator of truth, it is not infallible. This drives epistemologists to constantly examine and question the criteria for justification.

Epistemology is not just an intellectual pursuit, but a practical one as well. In today's world of misinformation and fake news, understanding the sources and processes that contribute to our beliefs is critical. By engaging with epistemology, we can better equip ourselves to navigate the complexities of the modern world and make wiser choices based on more reliable and accurate knowledge.