Deduction, logic and comparison
Above the sensual perception, there is the way of expanding one’s awareness through experimentation, comparison, logic and study. This process is called anumana.
A very important question in this process is the causal effect. What causes what, and what are the effects of different interactions in the physical world? The mind and intellect are playing the most prominent role in anumana. As this process is based on the experience of our physical senses or the thoughts and knowledge of others (which is again at some point based on sensual perception), it is again limited, even though some deeper awareness can be there.
Anumana allows us at least to take into consideration that there are things which we cannot see. Still it is not broad- minded enough to simply accept information, which could be revealed in one way or another from a higher dimension. This is a symptom of weak faith. As the process is very speculative, we can never come to the final conclusion about higher truths of existence. Revelations from higher dimensions are as real as there is a cause for every dimension. As there is a father of every son, there is also a creator of everything created. It is not an unreasonable proposal at all.