Your rebuttal was unsubstantiated and was purely speculative because it pivoted on pure conjecture without addressing any of my arguments directly. Expecting myself to present evidence when you yourself haven't even substantiated your argument is purely dishonest. There's honestly no need to reiterate or elaborate even further when you haven't directly pinpointed why my conclusion was at fault.
With that said, my argument seemed as it were a straight-forward premise because the concept itself is simplistic and self-explanatory and didn't require further elaboration. If I were to specify further, I'd be using a form of deductive reasoning, forming a logical conclusion based on multiple premises that are found to be true:
1. The Juubi is stated to house Senjutsu.
2. Sasuke utilized the Juubi's Chakra via Susano'o.
3. Therefore, Sasuke utilized Senjutsu chakra.
I arrived at this conclusion based on these two aforementioned premises, that the Juubi houses Senjutsu and Sasuke housed the Juubi's chakra, all of which are explicitly stated in the manga. Because these examples establishes that Sasuke housed a being with Senjutsu chakra, then Sasuke himself used Senjutsu chakra as Indra Arrow was fueled by the Juubi's Chakra. I arrived at the conclusion based on logical deduction and to claim that it's not substantiated is a false proposition.
