Advice and help needed

Right. So somehow the topic of Islam came up to my parents and I, and I think they know I'm a doubtful Muslim. My dad was actually pretty pleased I was asking lots of questions, but my mom lost her shit and said if she sees me going through doubtful websites again then she's taking away my devices forever. But in the end, he said to ask him any questions, so I need STRONG questions that will genuinely strike him. I asked about slavery, women sex dolls, and so many others but I genuinely feel undereducated because he was able to answer them all. So I need questions that will make him realize I'm deep into this, WITH proof.

UPDATE: why tf is there a muslim in the comments replying to each and every one of them sounding like my father?