Question: Is the following sentence factually correct?
"Diphtheria toxin is a single, 90-kDa-molecular weight protein composed of three peptide chains, fragment A, fragment B, and fragment C."
Options:
- yes
- no

Let me think..... Diphtheria toxin is a single, 60-kDa-molecular weight protein composed of two peptide chains, fragment A and fragment B. The answer is no.

Question: Is the following statement true?
"Mongols ruled North America for many centuries."

Let me think..... It is outlandish, the Mongols were never on the North American continent ruling over the land. The answer is no.

Question: Is the following statement true?
"German Shepherd are great guide dogs."

Let me think..... The German Shepherd is an intelligent breed of dog. The answer is yes.

Question: "Orson Scott Card dances in the rain when there's thunder."
Is the above claim true?
Options:
- yes
- no
Let me think..... I think the sentence is false because there is no proof of him dancing in the rain. Some physical proof would be needed for this to be deemed true. The answer is no.