You might find the thread linked below a useful read in terms of explaining what radicals (in the context of WK are and are not) and how they are used.
Also useful, for understanding radicals as WK uses them is the following article.
You might find the thread linked below a useful read in terms of explaining what radicals (in the context of WK are and are not) and how they are used.
Also useful, for understanding radicals as WK uses them is the following article.