question: What is a significant hurdle in this research ?
answer: proving that a subject 's conscious mind has not grasped a certain stimulus , due to the unreliability of self-reporting
turker_answer: A significant hurdle in this research is proving that a subject 's conscious mind has not grasped a certain stimulus , due to the unreliability of self-reporting .
rule-based: A significant hurdle in this research is proving that a subject 's conscious mind has not grasped a certain stimulus , due to the unreliability of self-reporting .