Loading
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
下面哪一个是 Modus Ponens（肯定前件）的 argument form？
Modus Ponens 对应的 tautology 是哪一个？
下面哪一个是 Modus Tollens（否定后件）的 argument form？
Modus Tollens 对应的 tautology 是哪一个？
“If it is snowing, then I will study discrete math. It is snowing. Therefore, I will study discrete math.” 这个 argument 用了哪条 rule？
“If Zeus is human, then Zeus is mortal. Zeus is not mortal. Therefore, Zeus is not human.” 这个 argument 用了哪条 rule？
填空：“If there are more pigeons than pigeonholes, then at least two pigeons roost in the same hole. There are more pigeons than pigeonholes. Therefore, ______”
填空：“If 870,232 is divisible by 6, then it is divisible by 3. 870,232 is not divisible by 3. Therefore, ______”
“If Margaret Thatcher is the president of the U.S., then she is at least 35 years old. Margaret Thatcher is the president of the US. Therefore, she is at least 35.” 这个 argument 是 valid 吗？
已知 p → q 和 ¬p，能否 valid 地推出 ¬q？
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
16 questions
