"But the fact a person denies that he is theorising is no reason for taking him at his word and failing to investigate what implicit theory is involved in his statements"

This quote by Talcott Parsons is emphasizing the significance of understanding the implicit theories that exist in a person's declarations, even if they deny that they are theorizing. He is suggesting that we ought to not take a person's word for it and instead examine what implicit theories are present in their statements. This is very important due to the fact that implicit theories can typically be more influential than explicit theories, and can shape the method we think and act. By comprehending the implicit theories present in an individual's declarations, we can gain a much better understanding of their beliefs and motivations. This can help us to much better understand their behavior and make more educated decisions.