- Authors of one paper withdrew their submission.
- Authors of one paper said they were unavailable due to other commitments.
- Authors of one paper scheduled a meeting but did not show up.
- Authors of three papers were unable to answer basic questions about the paper.
- Authors of three papers answered questions about high-level ideas in the paper but had difficulty when asked further questions on technical details.
- Authors of one paper answered all of my questions (although I identified a major flaw in that paper)