Take heed of the admonition from the 1973 classic film 'The Exorcist'. Recall the scene in which Father Merrin, the senior priest, sternly cautions the younger, inexperienced Father Karras to avoid engaging in any debate or conversation with the devil that is possessing the little girl. Here is the line:
"Especially important is the warning to avoid conversations with the demon. We may ask what is relevant but anything beyond that is dangerous. He is a liar. The demon is a liar. He will lie to confuse us. But he will also mix lies with the truth to attack us. The attack is psychological, Damien, and powerful. So don't listen to him. Remember that - do not listen."
Be he physical or metaphorical, this is how the Devil operates. First, he gently pleads for a small "door-opening" - a "debate". Then, by mixing truth with lies, he sows the seeds of confusion where there shouldn't be any confusion at all.