[KoRn]

"What does that say about Carl Sagan’s “Super Greenhouse(TM)” theory which supposedly explains the 900F surface temperatures on Venus??"

Could it be that Venus is closer to the Sun? Could there be other factors on Venus in addition to CO2 levels that would make the planet hotter? When dealing with other planets, there are so many unknowns. Unless someone actually goes to the other planet, such things will be no more than a theory.

[Lucius Cornelius Sulla]

Unless someone actually goes to the other planet, such things will be no more than a theory.

That won't help. We are ON earth and it is 'no more than a theory' here.