I think, Therefore God.

P1. Doubt everything (knowledge, trustworthiness of senses, Logic, external world, etc)
P2. Doubt thoughts
C1. Thoughts cannot be denied (the act doubting thoughts is a thought.)
P3. Certainty is an occurrence which cannot be doubted or denied. (Denial is occurrence of thought)
C2. thinking and experience exist (certainly, at least within my observation)
P4. Let T = {X1, X2, X3, ..., Xn} be the set of specific thoughts, where each Xi represents a different thought (for example, X1 = "I hate ice cream", X2 = "I hate pizza", X3 = "I want to go for a walk").
P5. X1 occurs.
C3. The content of X1 is not contained in T - {X1}.
C4. Therefore, X1 = T−(T−{X1​}) ⇒ −−X1 ⇒ X1​ (Law of Identity)
C5. Therefore, X1 ≠ T - {X1} (Law of Non-Contradiction)
P6. repeat P5-C5 for Xi to Xn.
C6. IF a proposition about Xn ≠ Xi, then it must = -Xi ("NOT-Xi")
C7. Therefore, Xn ​= Xi OR Xn ≠ Xi (Law of Excluded Middle)
C8. the truth of any proposition belonging to the set T is determinately TRUE or NOT-true
P7. there are n Xi that i am not certain of.
C9. Knowledge is limited.
P8. but the truth is/was determined already. (C4, C5, C7, and C8)
C10. Therefore, Truth exists even when i don't certainly know it.
P9. For something to be true it must be possibly true (able to be true or NOT-true).
C11. If a proposition Xi violates C4, C5, and/or C7 (for example, the proposition "A square-circle exists" which violates C5, and C7 by extension) it must be NOT-true.
P10. The proposition "Does certain truth(s) exist outside of 'me'" occurs
C12. IF NO then all certain truth(s) must be contained in "me, which implies i know all available certain truths. But this cannot be, since (C8, C9, C10), and there are truths of which i am not certain (including this very proposition). IF YES then certain truth(s) must exist outside of "me." and determined already (P8)
C13. Therefore, there must be another that contains certain truth(s)
P11. Let Knower = one that possesses an understanding of truth(s)
P12. Let Knowledge = the determinate truth-value of a given proposition.
C14. Therefore, to have knowledge you must be a knower (of the truth).
C15. Therefore, knowing is the relation where a Knower possesses a determinate truth
C16. Therefore, Knowledge = the determinate truth possessed by a Knower.
C17. Therefore, all truth is known by a knower as knowledge.
C18. Therefore, For all knowers Kx and Ky, there exists a knower Kz such that Kz knows all truths that Kx and Ky know. (we know that the Xi in Set T are determinately TRUE or NOT-true, say a knower K1 only knows X1 and K2 only knows X2. then there must be a knower (K3) which knows X1 + X2 labeled here as X3, because the content of X3 ≠ X1 OR X2)
C19. Therefore, there exists a Knower which knows all truths in Set T (X∞)
C20. Therefore, The Knower who knows all truths in Set T knows that there exists a knower ('me') who knows some subset of T.