My only objection to this is that philosophers can also use metaphors. They can simply describe or redescribe, without argumentation. According to Kojeve, for instance, Hegel's method is not dialectical but rather only the non-dialectical description of something that was dialectical. According to Kojeve, Hegel was in the right place at the right time where such description/explanation was sufficient.

I found this on Wiki.
Explanations and arguments

Main article: Argument
While arguments attempt to show that something is, will be, or should be the case, explanations try to show why or how something is or will be. If Fred and Joe address the issue of whether or not Fred's cat has fleas, Joe may state: "Fred, your cat has fleas. Observe the cat is scratching right now." Joe has made an argument that the cat has fleas. However, if Fred and Joe agree on the fact that the cat has fleas, they may further question why this is so and put forth an explanation: "The reason the cat has fleas is that the weather has been damp." The difference is that the attempt is not to settle whether or not some claim is true, it is to show why it is true.
Arguments and explanations largely resemble each other in rhetorical use. This is the cause of much difficulty in thinking critically about claims. There are several reasons for this difficulty.

• People often are not not themselves clear on whether they are arguing for or explaining something.
  
• The same types of words and phrases are used in presenting explanations and arguments.
  
• The terms 'explain' or 'explanation,' et cetera are frequently used in arguments.
  
• Explanations are often used within arguments and presented so as to serve as arguments.
  

To describe subjective experiences metaphors are necessary.

Let's consider the invention of the concept of causality. Was the concept of causality created by argument or rather by description? Aristotle used the metaphor "beginning" for cause. He described/invented an explanatory concept. We adopted it because it appealed to us, seemed empowering, comforting, useful. The concept "nature" is another invention. Nature= reason. We have a chain of abstractions. Beginning is also an abstraction. How was "beginning" invented?

In his Posterior Analytics and Metaphysics, Aristotle wrote, "All causes are beginnings..."[6], "... we have scientific knowledge when we know the cause..."[7], and "... to know a thing's nature is to know the reason why it is..."[8] This formulation set the guidelines for subsequent causal theories by specifying the number, nature, principles, elements, varieties, order of causes as well as the modes of causation. Aristotle's account of the causes of things is a comprehensive model.

Beginning's etymology: From Old English beginnan, from a Proto-Germanic root apparently meaning 'open up'; for the sense development, consider English open fire, opening ceremony, etc.

Of course Aristotle used a greek word, but I suspect we will find the same sort of thing. Abstract words trace back to the concrete and the sensual.

He demands an explanation of my description of explanation. Perhaps a description of this will serve as an explanation.

"Cause" is an invented concept. It comes from the word for beginning. But this word "beginning" was used in unexpected ways until the notion of causality was associated with it. It was born as a metaphor. Slowly it cooled and hardened. Now causality is a literal concept that most people assume has always been here.

Why wasn't it a "literal concept" in the beginning too? What makes you think it was "born as a metaphor"? And what do you mean by, "now causality is a literal concept"? What would it be for it to be a metaphorical concept? I really don't follow what you are saying. Aren't all concepts invented? No one just finds them lying about under the brambles.

Why wasn't it a "literal concept" in the beginning too? What makes you think it was "born as a metaphor"? And what do you mean by, "now causality is a literal concept"? What would it be for it to be a metaphorical concept? I really don't follow what you are saying. Aren't all concepts invented? No one just finds them lying about under the brambles.