Truth or dare is basically when you need to choose between the 2 options. The AI asks you a question, either you answer or complete a dare. If you decline the dare, it will subtract a point but if you do the dare you have been given, you will get an extra point.
The same scoring point goes for the truth, if it asks you a question, and you say no you will lose a point for being boring but if you say yes you will gain a point for being cool!