Flaws in arguments vary in type, but they are all eventually flaws... Its is important to have knowledge in various types of flaws and fallacies used in arguments! The most notorious of those fallacies is the over-generaliztion.
One of the less commonly known fallacies, which usually passes unquestioned, is the "
argument by lack of imagination" or alternatively called "argument by ignorance";
To give an example of such argument:
Imagine that at year 1000 BC, two people had this little chat,
PersonX: I wish I can reach the moon.
PersonY: You are unrealistic person. It is impossible to reach the moon.
Obviously, PersonY lacks the basic element of imagination, therefore had made a false assumption based on his ignorance of the possibility to land on the moon.
One of the notable usuages of this kind of argument is in oposition to atheism; It is said that in the old times, this conversation happened between a religious person and an atheist:
Religious: Yesterday i saw a ship; It had no crew, it had no captain, it was sailing in the middle in the sea without anyone onboard!
Atheist: Sorry Sir, I think this is a made up lie!
Religious: So you are telling me that it makes sense that our whole world, with all galaxies... The accurate system in which a simple flaw can be drastic... This big big universe can exist without a captain managing it, yet find it questionable to find a ship without a captain?
Obviously, that religious person lacks the basic element of imagination! I leave the proof to the smartasses out there!! ;)
One of my school teachers used to say: "Imagination is more imprtant than knowledge"; I have to agree, because you can gain knowledge by imagination, while without the element of imagination you cannot make use of the knowledge you have!