Earlier quoted context omitted.
Name me two. And I've read some Plato some years ago. I would not classify him as a clear thinker by any remotely modern standards.
You might like American Pragmatism: CS Peirce, FP Ramsey, CI Lewis, William James, John Dewey, etc. Peirce's "How to Make Our Ideas Clear": https://courses.media.mit.edu/2004spring/mas966/Peirce%20187...
[1] https://en.wikipedia.org/wiki/Existential_graph
[2] https://arisbe.sitehost.iu.edu/
[3] https://arisbe.sitehost.iu.edu/menu/library/bycsp/bycsp.HTM
[4] https://arisbe.sitehost.iu.edu/menu/library/bycsp/fixation/f...