Intelligent thought is of three parts:
1) the selection of one or more premises.
2) followed by one or more successive steps of evaluation of those premises in various forms and proportions and in various ways.
3) the statement of one or more conclusions.
Since the human intellect is a biological mechanism, it is not perfect in any of its functions. It may accept inputs and the knowledge received thereby may be near truth, but it can never be better than truth and in fact must always be less than truth. There is nothing magical or spiritual about the human neural system. It processes and acts on information. It cannot create anything. It may process the perceived truth into other forms but may not create knowledge during the process.