I'd appreciate you clarifying "eviscerate" here, if you mean you can convince them the earth is round then hooray - but there are some incredibly stubborn people out there so I really doubt your prowess... More likely I assume that by "eviscerate" you mean that you can walk away from the conversation feeling like it's impossible for a rational person to disagree with what you said - that's certainly a nice feeling for you but I strongly doubt you're having any significant impact on their beliefs.