open to question
1. Inviting, vulnerable to, or demanding investigation, examination, or scrutiny. Whether or not this new policy is having the intended effect, however, is still open to question.
2. Willing to receive and respond to question, refutation, or scrutiny. That's what I think was the greatest era of filmmaking, but if you think I'm wrong, please let me know—I'm open to question. I'm always open to question, but be prepared to receive honest answers.