n analysis (No. 106). Sage. 18. Thompson, E.,& Cosmelli, D.(2011). Brain in a vat or body in a world? Brainbound versus enactive views of experience. Philosophical topics, 163-180. 19. Blumenhagen, R., Lüst, D.,& Theisen, S.(2013). Basic concepts of string theory (Vol. 17, pp. 21-23). Berlin: Springer. 20. Lüst, D.,& Theisen, S.(1989). Lectures on string theory (Vol. 346). New York: Springer-Verlag. 21. Becker, K., Becker, M.,& Schwarz, J. H.(2006). String theory and M-theory: A modern introduction. Cambridge university press. 22. West, P.(2001). E11 and M theory. Classical and Quantum Gravity, 18(21), 4443. 23. Gopakumar, R.,& Vafa, C.(1998). M-theory and topological strings--II. arXiv preprint hep-th/9812127.