His credibility to talk about the usability of an iPad goes away when he shows himself to be uneducated on some software terminology? I don't have a clue about

His credibility to talk about the usability of an iPad goes away when he shows himself to be uneducated on some software terminology? I don't have a clue about the chemical makeup of sucralose, but I feel confident stating that the new Splenda Diet Coke tastes better than regular Diet Coke.