- Consider the blank card: it does not matter whether or not there is a number on the other side because the statement is still true in either case.
- 考慮那一張空白卡片:有沒有一個數字在那一張卡片的另一邊並沒有關係,因為無論哪一種情况,命題依然成立。
- Consider the C card: You need to check the C card because the statement will be false if there is a number on the back.
- 考慮那一張有一個 C 字在上面的卡片:你需要檢查這一張卡片,因為如果另一面有數字在這張卡片上面的話,命題將不成立。
- Therefore, the C card is the only card you need to flip.
- 因此,那一張有一個 C 字在上面的卡片是唯一一張你需要反轉驗查的卡片。
以下內容將不作翻譯。
Edit for clarity:
Examine the table below for all possible scenarios:
Scenario # |
C Card |
Blank Card |
True/False |
1 |
Number |
Number |
False |
2 |
Number |
No Number |
False |
3 |
No Number |
Number |
True |
4 |
No Number |
No Number |
True |
- There is a number on the back of a non-blank card. Therefore, the statement is false. Verification is only needed on the C Card.
- There is a number on the back of a non-blank card. Therefore, the statement is false. Verification is only needed on the C Card.
- All cards that are not blank do not have numbers on the back. Therefore, the statement is true. Verification is only needed for the C Card.
- All cards that are not blank do not have numbers on the back. Therefore, the statement is true. Verification is only needed for the C Card.
In all the scenarios, you only need to check the C Card.
If you have any questions about this specific edit, tag me in your comment.