Not to the human brain. If you believe Strawberry Pop-Tarts are better than Blue Berry Pop-Tarts and you know that 1 + 1 = 2 your brain processes the information in the exact same way. This is what can make persuasion difficult: how to you get someone to view an idea they see as true in a different way? This is a little off topic, but still relevant in the way Gorgias explains his views.