@pagan,
Wittgenstein observes that some things cannot be defined in a singular way. They can only be understood by bringing together a number of forms. These forms can be used to relate different things together under 'family' resemblances. Thus a chair cannot be simply defined, but its familiar characteristics can be brought together to create understanding and in that kind of understanding different chairs can be compared. Eg something to sit on, something near a table, something with legs that make it stable, and so on.... and thus a dolls house chair can be compared to a dining table chair compared to a designer chair and so on. There is no one reducible form or characteristic for a chair. No established order of the various characteristics of a chair. Not even a characteristic that is necessarily the case for all chairs. Eg legs, to sit on, use at a table. None of those characteristics are necessary for a chair. And yet we understand and use the word chair. In fact it is when understanding requires complex ordered reduction that most people find a narrative difficult to use and understand. We tend to use these flexible narratives more commonly, with their flexibility in built by the very nature of their multitudinous roots and lack of strict hierarchy.
He goes further and says that in order to understand the language of the chair..... then see how it is used. Ie the language and the chair. The language game (or narrative) in question will use the term chair through its own set of characteristics. The chair itself will be understood through the different uses it has socially and also how different narratives teach and use the meaning of the word chair.
Many of the problems of philosophy arise when we take the analytical narrative (which intends to find the ordered underlying structure as a form of meaning) and apply it to forms that are more generally used and understood in the context of various and inconstant characteristics. Ie narratives that do not reduce the world to single structure, but rather to a dynamic collective of forms.
Thus to ask the question 'what is the structure and physical basis of the soul?' is to align oneself with the analytical philosophical narrative and apply it to a form that was taught and used by a completely different kind of language game. Such philosophical questions are likely to create semantic confusion, conflict and rejection. They appear frequently on philosophy forums.
But it should be noted that Wittgenstein is not rejecting ordered hierarchal structure as a valid means of understanding and use of language. It is just that it is not always useful to do so.... and often quite apparently so. It seems that to him an example of such a case is the analytical study of language itself as an attempt to solve its hidden riddles. The riddles are the pixies and imps created by asking something of the world using an inappropriate language game. You can never catch them using the language game that created them. But choose the right game and the questions are eminently answerable........ the false riddles do not appear in the first place.
I think this sounds ace ?.. but I do like chasing pixies

And besides, who decides the difference between a narrative created riddle and a riddle that the narrative can answer? Maybe pixies are real?
We learn words and language by example. We learn what a chair is from a finite number of examples. The word chair is ambiguous. Common language is ambiguous and we learn to talk and use such language before we demand certainty of definition. Fuzziness is eminently useful and adequate, and comes before clarity. Eg Mathematics must follow after common language. Total clarity as a demand, comes after the ability to make such a linguistic demand, which is made possible by ambiguous language forms themselves. Ambiguity (not chaos) is at the root of language as it is learnt, and ambiguity within a form is not possible if the basis of that form is singular and focussed. It must be multitudinous.
It is through the refinement of fuzziness (for its usefulness) that we can conceive of the logos. The pure well behaved centre, yielding perfect clarity of understanding. Or even, just the pure well behaved centre....... beyond perfect clarity of human understanding. As we refine, some of us strive for purity. It is a concept and intent that the ambiguity and use of language is bound to create. Pure knowledge, complete understanding. Clarity leading to the concept and intent, of certainty. The rejection of uncertainty as satisfactory. A quest, a faith, a demand, for oneness.