11.   The current fan optimism is based on solid reasoning.

12.   The Diamondbacks expect to be competitive right away, optimism based in part on financial expectations.

13.   The optimism is based on the belief that more semiconductors will be used in more and more products.

14.   The optimism is based on more than a year of preliminary discussions that laid the groundwork for formal negotiations this summer.

15.   The optimism was based on predictions lower interest rates and tax cuts would have boosted consumer spending.

16.   The Seahawks certainly have a solid nucleus of young talent in which to base their optimism, notably in rookie wide receiver Joey Galloway.

17.   Their optimism was based on several factors.

18.   Their optimism is based on the notion that the US economy has become extremely investor-friendly.

19.   They are basing their optimism for improved gates on new ownership and one of the most exhaustive marketing campaigns in baseball.

20.   Throughout Europe, many companies had based their optimism earlier this year on the conviction that the American economy would bounce back quickly.