100% of the time! It is important to mention unexpected/negative results in the discussion section of your research. Presenting results that do not conform to a hypothesis
is a fundamental aspect of the scientific method that must be adhered to maintain the academic integrity of your work. When interpreting such results, avoid dismissing them or attempting to manipulate their significance. Instead, objectively analyse reasons for their occurrence, consider any limitations or sources of error that might have influenced the findings, and discuss their implications for the broader research context. Demonstrating intellectual honesty and critical thinking in the way you handle unexpected or negative results will strengthen the credibility of your dissertation.