Are you sure they haven't memorized the Bible? I always assumed they did, by the way the rapidly quote verse after verse. I also heard the Zakir Naik memorized Hindu scriptures as well. And about memorizing relevant verses, how would you know what verses would be relevant in a debate? Your opponent could bring up any topic, so you wouldn't really know which verses to memorize. This is true. I myself though of them as scholars when I first saw their videos. I know better now though. Akhi, I dont remember ever watching a video in which Shabir denies a sahih hadith, and I've watched a lot of his videos on youtube. Can you provide a link? Well Shabir and Naik may have some deviant beliefs, but they sure know how to defend Islam. Watching there videos may help a new Muslims iman increase. But like I said, they rarely talk about fiqhi issues, so this isn't an unavoidable danger. Brother you are right. I Agree that Shabir and Zakir would probably be condemned or even declared apostates in an actual Shariah state because of some of their statements (like Shabir's about evolution), but this doesn't change that fact that they've refuted the Christians many times and are great da'ees (Zakir Naik has brought many people to Islam).