skeptibility 

(1) Level of incredulity appropriate to evaluating a claim despite its verisimilitude.

(2) An amalgamation of susceptibility and skepticism.

For example:

(1) On Wikipedia, increased activity in the discussions and frequent revisions should raise skeptibility.

(2) Dude, ever notice how bananas fit your hand perfectly? That means they were created for you!

Bro, you have no skeptibility, google "Origin of species - Science Fail"

skeptibility by c0ncernedcitizen December 9, 2011

Skepticality

1. The amount of skepticism
2. The act of being skeptical

"I don't believe in the Zodiac."

"Dude, I'm questioning your skepticality. You read your horoscope, like, every day!"

Skepticality by Cosman246 July 9, 2009

Skeetability 

The amount of semen one is able to produce in a single ejaculation

Since turning 40, Gary has noticed a decline in his skeetability.

Skeetability by Nostradainus June 16, 2019