سَأَصْرِفُ عَنْ آيَاتِيَ الَّذِينَ يَتَكَبَّرُونَ فِي الْأَرْضِ بِغَيْرِ الْحَقِّ وَإِنْ يَرَوْا كُلَّ آيَةٍ لَا يُؤْمِنُوا بِهَا وَإِنْ يَرَوْا سَبِيلَ الرُّشْدِ لَا يَتَّخِذُوهُ سَبِيلًا وَإِنْ يَرَوْا سَبِيلَ الْغَيِّ يَتَّخِذُوهُ سَبِيلًا ۚ ذَٰلِكَ بِأَنَّهُمْ كَذَّبُوا بِآيَاتِنَا وَكَانُوا عَنْهَا غَافِلِين(7:144)َ
"I will turn away from My signs those who are arrogant upon the earth without right; and if they should see every sign, they will not believe in it. And if they see the way of consciousness, they will not adopt it as a way; but if they see the way of error, they will adopt it as a way. That is because they have denied Our signs and they were heedless of them." (7:144)
Please heed this disclaimer: DO NOT USE THIS TO PICK A FIGHT WITH A DISBELIEVER! If you are challenged by a disbeliever, keep calm, and keep it simple. Determine if this person even has an interest in Islam being truth, and will even entertain the possibility that he or she is wrong; some people have no desire for Islam to be good, so they will use controversy to digress from reason and fundamentals. It is a waste time to argue with a fitnah maker. But it is beneficial to engage in peaceful and meaningful discourse. ALLAH knows best.