How can the skeptics give credence to both Lindzen and Spencer when their arguments are so contradictory?

Richard Lindzen recently made the following claim: “The greenhouse forcing from manmade greenhouse gases is already about 86% of what one expects from a doubling of CO2, and alarming predictions depend on models for which the sensitivity to a doubling for CO2 is greater than 2C which implies that we should... show more Richard Lindzen recently made the following claim:

“The greenhouse forcing from manmade greenhouse gases is already about 86% of what one expects from a doubling of CO2, and alarming predictions depend on models for which the sensitivity to a doubling for CO2 is greater than 2C which implies that we should already have seen more warming than we have seen thus far.”
http://www.skepticalscience.com/a-case-s...

This suggestion is absolutely ridiculous. It ignores the OCEAN’S THERMAL INERTIA as well as all negative forcings. Additionally, this claim appears to contradict Roy Spencer’s theory that the Pacific Decadal Oscillation causes global warming.

Spencer's theory could only be correct if the radiative forcing from the PDO were VERY large. However, this significant of a climate forcing would cause wild interannual temperature variations. Not surprisingly, Spencer has attempted to conceal this fact. As Dr. Ray Pierrehumbert points out, Spencer used a mixed layer depth that was nearly 16 times too large. Therefore, the climate system in his model had considerably MORE THERMAL INERTIA than the actual climate system. For this reason, large interannual temperature fluctuations did not appear in his simulation.
http://www.realclimate.org/index.php/arc...

In essence, Spencer’s claim could only be true if the ocean mixed layer were much deeper than it actually is. On the other hand, Lindzen’s theory could only be true if the ocean mixed layer were virtually nonexistent. Isn’t this ironic!

How can skeptics give credence to both Lindzen and Spencer when their arguments are so contradictory?
Update: @ Eric - Of course the oceans will release extra moisture into the air as the planet warms. This is one of MANY positive feedbacks!

Oh, wait - I thought that Lindzen and Spencer were arguing for low climate sensitivity...
Update 2: @ Eric - Can you explain why Spencer used an ocean mixed layer depth of EIGHT HUNDRED meters in the this blog post:
http://www.drroyspencer.com/research-art...
Update 3: My additional details should have read:

"...EIGHT HUNDRED meters in THIS blog post..."
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