Your dissertation committee wants you to succeed. They're not adversaries testing whether you belong. You've already proven yourself through coursework and exams. The fear that you're a fraud is normal but unfounded.
Your dissertation committee is not a jury trying to convict you. Professors do not enter the room hoping the candidate fails because you failing means an avalanche of paperwork, broken timelines, and wasted time for everybody. They want you to pass. A win is a win for them. The imposter syndrome telling you that you're a fraud is completely detached from reality. You didn't accidentally stumble through coursework and trip your way past comps. You earned this spot. Comment "help" and we will send you the link to our free dissertation help community. You've got this.