The word “might” should never appear in your thesis. Be direct and clear about the point you want to make, and don’t hedge or soften your statement. If you don’t feel strongly enough about your argument to put it in a declarative sentence, you should choose another paper topic. Aim for strong language that makes your support for your thesis entirely clear. Whether you’re establishing cause and effect, advocating for a solution, or interpreting something, you need to be your argument’s number one fan, and that relies on you using clear and definitive language.