You can't have a thousand books sitting on a shelf and not know anything. You must always know something if you have had enough to understand the difference between life and death or food and money or people and things for that matter. As we all seem to think and assume that we all know something but it is to the degree and depth of our intelligent understandings of the circumstances and event of each piece of knowledge or experience in knowing something as proven and true and right or substantiated by factualised evidence of structured facts and written dialogue. These comprehensive and incorporated understanding arte not just simple of the times through constructive thought patterns and discussions of consensus behavioural policies and the thorough introspective considerations of routine study. Always know something because if you know nothing you are pretty close to death.

Demonstrating an understanding of knowledge if showing your experience for the capacity of always knowing something without your head in the sand or staring at a motor on the block working without any understanding of how or why it is working or going. Differentiation between stupidity and intelligence is essential and the fact that comprehensive calculations add to the retrospective facts of dialogue and discussion demonstrates exactly what you know instead of what people in general assume as just too always know something.

To always know something also gives you an authoritative reference to substantiate the facts to present as a well documented case a set of criteria as evidence for a court room or parliamentary debate means that you have been able to substantiate the evidence of your case through well researched documentation of facts and evidence to present as truth in justifying and substantiating your argument., to always know something can be simple or complex therefore the obvious answer is self justification.