What is Inference ?

Despite differences, similarity is detected in the form of similar intellectual process which is based on the assumption where the knowledge of the surrounding either past or present events can be understood and gained through observation and reasons which is known as universal cognitive competence. 
The principle of universal cognitive competence postulates the concept that the existence of the truth of the facts will be established based on inferences / conclusions from the evidence which has been collected. 
However the truth is not the absolute truth.
The truth is regarded as a questions or issues of probability due to the limitation of the human knowledge. 
Besides that inquirers may not be totally confident that the evidence is absolutely certain, complete and accurate and the inferences derived from it are correct.