Final answer:
The statement about the Karnea convening annually is false; the Delta Tau Delta fraternity's convention, or Karnea, meets biennially. Gilbert Harman introduced the 'no false lemmas' condition to the Justified True Belief model, stating one cannot know P if P is based on false premises.
Step-by-step explanation:
The statement that the Karnea convenes on an annual basis is false. The Karnea, which refers to the general convention of the Delta Tau Delta fraternity, is not held annually but takes place every other year. This is part of the broader topic of convention scheduling and organizational rites for specific societies or fraternities.
In the context of knowledge and belief, American philosopher Gilbert Harman added a condition to the JTB (Justified True Belief) account termed "no false lemmas." According to Harman's view, a person knows P if, and only if, (1) P is true, (2) S believes P, (3) S is justified in believing P, and (4) S did not infer P from any falsehoods. In examples provided, like Dharmakīrti's, it's noted that believing something based on false premises does not constitute knowledge, even if the belief happens to be true.