- s too obvious to be doubted
- There is now indubitable evidence that there is water just below the surface of the moon.
- There is no occasion for panic for there is indubitable evidence that mortality rate of swine flu is about the same as any other flu.
- The indubutable charms of the jungle could not be seen from the aeroplane as a thick canopy of trees shrouded the jungle in mystery.
- Rene Descartes in Forbes
Descartes asks himself whether there is not "one thing : certain and indubitable" that can survive the rigorous skepticism forcing him to doubt everything he knows via his senses.