Recent theories of creative thinking propose that the generation of creative ideas by design novices and experts is restricted by the emergence of intuitive cognitive biases. To overcome these biases and explore expansive solutions, biased ideas must be discriminated from those with creative potential. Although studies in the field of reasoning have shown that biased participants tend to detect an incongruency between their provided solutions and the expected solution, the use of conflict detection in creativity has never been studied. Two experiments were conducted to determine the extent to which conflict detection occurs during creative idea generation and whether this mechanism is available for design novices (Experiment 1) and/or experts (Experiment 2). The results indicated that both groups of participants detected their fixation bias and managed to overcome it by switching from intuitive to deliberate thinking. In addition, we discussed implications for popular current (dual process) models.