Step 1: Understanding the Concept:
We add the new condition that R is 1st and U is 2nd. We then need to find a valid pair of topics that could be excluded from the 6-topic schedule.
Step 2: Detailed Explanation:
1. New Conditions: The schedule begins R, U, ...
2. Rule 4 (\(K_1 \lor R_1\)): This rule is satisfied. It does not mean K cannot be discussed at all, only that it cannot be first.
3. Rule 1 (\(\neg F \rightarrow U_6\)): The condition is that U is in period 2, not 6 (\(\neg U_6\)). By the contrapositive, F MUST be discussed.
4. Rule 3 (F \(\rightarrow\) MFS block): Since F must be discussed, the three-topic block MFS must be included in the schedule.
5. Schedule so far: R is in 1, U is in 2. The MFS block must be placed in three consecutive slots. The only available space for this is slots 3, 4, and 5. So the schedule is: R, U, M, F, S, \_.
6. Identifying the last topic: We have one slot left (period 6). The topics used are R, U, M, F, S. The remaining topics from the original pool of eight are K, L, T. We must choose one of these for the final slot.
7. Checking possibilities for slot 6:
- Can slot 6 be T? If we place T in 6, the schedule is R, U, M, F, S, T. Rule 2 requires T to be adjacent to L. L is not in the schedule, so this is a violation. T cannot be the 6th topic.
- Can slot 6 be L? If we place L in 6, the schedule is R, U, M, F, S, L. Rule 2 (T \(\rightarrow\) LT/TL) is not triggered because T is not discussed. All other rules are satisfied. This is a valid schedule. The topics NOT discussed are K and T.
- Can slot 6 be K? If we place K in 6, the schedule is R, U, M, F, S, K. Rule 2 is not triggered because T is not discussed. All other rules are satisfied. This is also a valid schedule. The topics NOT discussed are L and T.
8. Conclusion: There are two possible pairs of topics that are not discussed: \{K, T\} and \{L, T\}. We check the options to see which of these pairs is listed.
Step 3: Final Answer:
The pair \{love, technology\} is a possible pair of undiscussed topics, as shown by the valid schedule R, U, M, F, S, K.