Defining Key Terms
Skeptic Arguments/Hypothesis
Countering the Skeptic
Types of Skepticism
Ancient Skepticism
100

Properly, justified, true, belief. 

What is knowledge?

100

The fallacy that assumes the very thing they are trying to prove.

What is circular reasoning?

100

Someone who is closed-minded, ignores other information, demands extraordinary evidence, and doubts excessively. 

What is a bad skeptic?

100

It questions the reliability of our distinctive sources for belief.

What is Source Skepticism?

100

It is the phrase “I think, therefore I am” in Latin.

What is Cogito ergo sum?

200

An overarching branch that holds a view that questions the possibility of all knowledge and reality.

What is global skepticism?

200

It suggests that an evil genius is the source of our deception.

What is the Evil (Cartesian) Demon Hypothesis?

200

For example, the phrase “I don’t know anything” is one.

What is a fallacy?

200

It holds that moral claims are subjective and not grounded in any objective reality.

What is ethical/moral skepticism?

200

He was known to contribute to and elaborate on Pyrrhonian Skepticism.

Who was Sextus Empiricus?

300

A view that questions the possibility of knowledge in a particular area of study.

What is Local Scepticism?

300

It suggests that everything is one big delusion.

What is the Dream Hypothesis?

300

It is the stance that chooses to keep one’s beliefs instead of the radical hypothesis at hand.  

What is the Principle of Belief Conservation? 

300

It questions the reliability of our sensory perception.

What is empirical skepticism?

300

He introduced the method of radical doubt.

Who was Rene Descartes?

400

The Greek word meaning “withholding of judgment“.

What is epoché?

400

It suggests that age is only a deceptive appearance.


What is the Five Minute Hypothesis?

400

It is based on G.E. Moore’s statement “I know I have two hands”.

What is the “Common Sense” argument?

400

It demands rigorous evidence and analyzation, using empirical evidence as the basis for knowledge.

What is scientific skepticism?

400

Someone who believed that people should always be “quick to question and slow to believe”?

Who is Pyrrho of Elis?

500

The Greek word meaning “freedom from worry or anxiety”.

What is ataraxia?

500

It questions the possibility of knowledge and certainty by posing abnormal ideas. 

What is radical skepticism?

500

It is the theory that asserts that beliefs are justified based on the evidence available for them; however, in excess, is simply impossible to satisfy. 

What is evidentialism?

500

It suspends judgement on religious and supernatural claims. 

What is agnosticism?

500

Believes that knowledge is impossible to achieve for humans and denies its certainty.

What is academic skepticism?

M
e
n
u