Probability is not Certainty
However preferable it might be otherwise, we can’t be absolutely certain about quite a lot of matters — especially those matters that are the focus of many debates. When a person exercises skepticism and critical thinking, they remember that just because they can show a conclusion is probably true, that doesn’t mean they have shown or can show that it is certainly true.
"I cannot teach anybody anything, I can only make them think."
Sharpen Your Critical Thinking Skills (by Jeff Cobb)