The willingness to maintain a position until convinced otherwise is known as __________.

The concept being described is best captured by assertiveness, which involves standing firm in one’s position or beliefs while being open to discussion and evidence that may challenge those views. Assertiveness reflects an individual's ability to express their thoughts and opinions clearly and confidently while also respecting the perspectives of others. This quality is crucial in many situations, including negotiations or discussions about operational decisions in UAS contexts, where clear communication and a firm stance may be necessary until valid information warrants a change in perspective.

In contrast, while cooperation involves working harmoniously with others and may require flexibility in one's position, it does not imply a steadfastness to a viewpoint. Resilience refers to the ability to recover from setbacks or adapt to difficult circumstances, which does not directly address the concept of maintaining a position. Confidence involves self-assurance and a belief in one's abilities, but it does not inherently include the aspect of holding a position until convinced otherwise. Assertiveness captures the essence of that willingness to hold one's ground, making it the correct choice in this context.