But can one solve philosophical problems that way? Swimming be strong be brave be humble be badass poster. We should go back to Descartes’s argument. His goal was to achieve an assertion of the nature of life and he began by asserting that everything must be suspicious first. He doesn’t want to build on sand, you see. You have expressed it very well, baby. Now, Descartes does not consider it plausible to doubt things, but he does think that everything can be doubted in principle. For example, we cannot guarantee that we will progress in the study of philosophy by reading about Plato or Aristole.