1. South Korea had not offered conclusive evidence of where a rocket would have come from.

2. No conclusive proof has been provided and no criminal charges have yet been filed.

3. He did not find the evidence conclusive, but he was curious.

4. The sample size may be a bit small to be scientifically conclusive, but the results are interesting nevertheless.

5. But it has been 50 years, and no conclusive evidence has emerged.