Suppose that some knowledge base contains various propositional-logic sentences that utilize symbols a, b, c, d (connected with various connectives). there are only two cases when the knowledge base is false:
- first case: when a is true, b is true, c is true, d is true.
- second case: when a is true, b is false, c is true, d is false.
in all other cases, the knowledge base is true. write a conjunctive normal form (cnf) for the knowledge base.

the supreme court is the highest of courts so this would be true

have a great day!

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.