Flat stone hollow stone clarity

Nothing I wrote is confusing, but the interpretation of others is or at least can be. If you need a a convex bevel on a plane or chisel iron you can use either flat or hollow stones and both give pristine results (but very obviously you cannot use a hollowed stone for flat face aspects of sharpening, which is of course a common need). The hollow stone has the naturally occurring built-in capacity to create a convex bevel by simply moving the iron along the concave surface, whereas the flat stones is a question of starting at 30-degrees and, as you move forward with each stroke, gradually dropping the hand so you create a quarter-eliptical shaping to the bevel. It’s a perfectly natural movement and that’s what is created anyway. Dead flat and micro bevels limit the function of the chisel to splitting and paring but the edge tends to be weaker and indeed much more prone to fracture if too fine.

My posts are to address legalism that has somehow substituted for what is and should be totally intuitive and free with minimal practice. Try both and see which one suits you and if you like, you could even use both methods without being a heretic at all.