Fooling yourself means being convinced about something and thinking it is factual when in reality, it is false. Scientists are the people who carry out researches and find evidence to explain the events that occur around us. They are able to convert hypotheses into theories and theories into laws.
It is important for scientists to be objective. They cannot allow their researches to be influenced by emotions or personal beliefs. Their experiments must be reliable, valid and controlled so that the results they obtain can also be reliable.
It is easy to make mistakes whilst carrying out researches that last decades. Committing mistakes whilst carrying out experiments and studies might cause the results to be inaccurate. If a scientist does not recognise the fact that he/she is making a mistake then they may convince themselves that the results they obtained are reliable. The will be “fooling themselves”.
The easiest way of eliminating such mistakes is peer review. If another group of scientists carry out the experiments and obtain different results, then there must be something wrong. This allows scientists to identify any faults in their methods. Scientific bodies must ensure that all experiments are carried out under a controlled environment. Doing this will remove other factors that could be affecting the research, hence increasing the reproducibility of a scientific experiment.