Is there a word to describe beliefs that are neither scientific nor false nor religious?

If I believe that the Spaghetti Monster lives under my bed, what word would you use to describe this? It can not be proven that the Spaghetti Monster does not live under my bed because you have not looked there but I also have not proven it to be true myself. It's not a religious belief because religious beliefs are by definition "the belief in and worship of a superhuman controlling power, especially a personal God or gods" and this is not a belief in a higher power, just a scary Spaghetti Monster. And it's also not a scientific belief because it has not been scientifically proven. Furthermore, it is not a false belief because one has not proved it to be false.

Hope this makes sense.

It's not a religious belief because religious beliefs are by definition "the belief in and worship of a superhuman controlling power, especially a personal God or gods" and this is not a belief in a higher power, just a scary Spaghetti Monster. And it's also not a scientific belief because it has not been scientifically proven. Furthermore, it is not a false belief because one has not proved it to be false.

If it has been neither proved true nor proved false , then it would be:

• an unsubstantiated belief

Here's the definition from Oxford Dictionaries online:

Definition of unsubstantiated in English: ADJECTIVE

Not supported or proven by evidence:

• 'unsubstantiated claims'

Reference: "unsubstantiated", Adjective. Oxford Dictionaries Online. Accessed January 6th 2015

Your question is interesting and it can be interpreted in at least two ways.

If we focus on your phrase, "It can not be proven...", then I think the concept you are searching for is falsifiability.

Alternatively, if we focus on the phrase, "...I also have not proven it to be true myself," then I believe the concept you are looking for is willful ignorance because you refuse to investigate your "belief".

Beliefs can be many things: moral, philosophical, existential... An all-encompassing term would simply be personal beliefs.

A notion is a fanciful or foolish idea (Dictionary.com). A spaghetti monster under the bed is just a notion, with no facts to prove or disprove it.

an idea that is believed to be true or valid without positive knowledge (has this naive notion that most people are basically honest) (Merriam-Webster)

Other words that indicate a belief not supported by evidence include

• feeling
• sense
• hunch
• instinct
• intuition

but these words tend to convey an increasing degree of reliability, which may be based on experience in similar circumstances where the belief was ultimately proved.