Self-Criticism at the Heart of Writ

Self-Criticism at the Heart of Writing a Discussion Section

For this purpose, you should criticize the experiment, and be honest about whether your design was good enough. If not, suggest any modifications and improvements that could be made to the design.

Maybe the reason that you did not find a significant correlation is because your sampling was not random, or you did not use sensitive enough equipment.

The discussion section is not always about what you found, but what you did not find, and how you deal with that. Stating that the results are inconclusive is the easy way out, and you must always try to pick out something of value.