Objective measure of "one thought per zettel"
I'm looking for an objective(-ish) measure of the one-thought-only measures. Any ideas?
a small background:
Recently, I have been getting into learning programming, and I stumbled into Uncle Bob's lectures on clean coding (available on youtube, as of now). In there he outlines that there is this principle that a good function, is a function that does one thing, and does it well.
However the one thing was up for interpretation. (for example It used to be a fuction that can fit into a screen. which is not really that well of a measure). He goes on to say that they came up with a good objective measure: a function that no one can meaningfully extract another function from.
It seems like a very well solution for a definition problem.
The need for "one thought"
The same sort of definition problem is also present in the case of a zettel. Although assuming one thought per zettel might not be essential nor desireable for every type of zettelkasten, it can be useful for some, in order to make a synthesis of an unstructured body of knowledge and emerge with a structure.
For example, I might be trying to understand a school of though, this school may be offering
argument A as a an argument for their belief. However,
argument A is made up of 5 parts, each part can be argued against, in seperate ways, and the arguments against may be challenged in different ways and so on. One might try to gather arguements againts and try to categorize them, summerize them, and essentially refactor them. In this situation, if each zettel only contain one and only one thought, it would be much more of an elegant workflow to put them against each other.
The need for objectivity
An objective measure, can be extremely useful, in order to maintain the flow, and unload a cognitive load of "is it too big or too small?"
However, what ever I can think of, have a good level of obscurity, in which lazyness can live as a king. As an example, consider one sentence per zettel, which can be a very long sentence , in which the proposition offered in that sentence can be challenged, or can be argued for, while it goes on and on, not dissimilar to the current sentence you are reading, as a sentence can be compounded with other sentences, and still be counted as only one sentence, however hard to read it gets.
What are your thoughts on this matter?