Knowledge is rarely if ever an absolute and should be continuously tested against the current reality. New information received can and does alter the perception of what has been held as truth. A person residing in the Middle Ages had no issue with ‘knowing’ that the world was flat. Newtonian physics was regarded as being absolute fact until situations were encountered that did not ‘fit’.
As well as new information having an impact on the validity of what is known so does the framework within which it is applied. We know for instance that 1+1=2. This is certainly the case generally but not when working in a binary framework where 2 does not exist in this framework. We now need to know that 1+1=10.
There are also cultural differences that can affect how knowledge can be applied. In any homogeneous environment knowledge of body language cues relating to such things as ‘eye contact’, ‘gestures’, ‘personal space’, ‘hand shakes’ can be readily learned. Communication however, if this knowledge is applied in a different cultural environment, can be significantly and adversely disrupted.
Knowledge acquired should not be regarded as sacrosanct. It is always subject to change depending on the facts available. It is also open to interpretation depending on the framework in which it resides.
Knowledge is dynamic, responding to the world.