Chance of life on other planets developing high intelligence

Question

Debate Set-up of the issue and debate between Mayr and Sagan
What’s the issue being debated? Why is it interesting/significant?
Briefly state the positions that Mayr and Sagan each hold on this issue

Argument Summary: Identification of the point of disagreement that you are focusing on, and the claims made by each regarding this point (For us choose either the chance of life developing a high level of intelligence or the chance of highly intelligent creatures developing into a civilization capable of sending messages into space)
Introduce and explain the point of disagreement
Summarize Mayr’s position on the point
Summarize Sagan’s position on the point
Debate Evaluation– who has made the stronger argument on this point and why you consider it to be stronger?