If one thinks about it, even basic truth may not be so evident.
For example, consider Cogito, ergo sum. As Latin has no continues verb time, that phrase may mean I exist because I think. Or I am existing because I am thinking . The latter implies that when one stops thinking the existence stops, the opposite of the former. Philosophers still debates what exactly Descartes meant.
Or consider the notion of time flow. In 1908 John MacTaggart published a paper arguing that the feeling of time flow is unreal. Again, there are heavy debates about the validly of his arguments without any conclusion with quite a lot of philosophers accepting the argument and even arguing that the time flow is an illusion.
For example, consider Cogito, ergo sum. As Latin has no continues verb time, that phrase may mean I exist because I think. Or I am existing because I am thinking . The latter implies that when one stops thinking the existence stops, the opposite of the former. Philosophers still debates what exactly Descartes meant.
Or consider the notion of time flow. In 1908 John MacTaggart published a paper arguing that the feeling of time flow is unreal. Again, there are heavy debates about the validly of his arguments without any conclusion with quite a lot of philosophers accepting the argument and even arguing that the time flow is an illusion.