Machine-translated by Google. Questions are authored in English.
Top

Discussion

When does a clause become conflicting during a search?

  • A.Half of its literals have been assigned false so far
  • B.None of its literals appears in any other clause
  • C.Every one of its literals has been assigned false
  • D.One of its literals has been assigned false

Answer: C

A clause is falsified only when every literal has been assigned false, at which point the current assignment cannot be extended to a solution and the solver must backtrack. A single false literal merely shortens it. The other conditions are not meaningful. Recognising exactly when a partial assignment is proved hopeless, rather than merely looking unpromising, is what makes the pruning sound.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.