If someone has read Hegel, then they are a philosopher.
If someone has read Kripke, then they are a philosopher.
Thus, if someone has read Kripke, then they have read Hegel.
Answer: If you assume that the conditional and fact above are true, must the conclusion also be true?
Yes, the conclusion must be true if the conditional and fact are true.
No, the conclusion might be false even if the conditional and fact are true.