For instance we are told that Hanuman went to collect Sanjeevani from Himalayas. We also know now that there is a mountain in Shri Lanka, which is different from other mountains and even today herbs are collected from this for various ailment by local population. This mountain was considered BLESSED for herb plantation because Lakshman was cured from herbs of this mountain. Was this brought from Himalayas? Certainly NOT! Hanuman ji did bring a whole set of herbal plants, including Sanjeevani plant along with the roots instead of leaves, and this was grown there and thrived there since then. He could not and did not bring the whole mountain from Himalayas. That would have required SUPERNATURAL or MIRACULOUS powers, for which we have already agreed that these powers were not available. Use of such powers in describing events of Ramayan causes Passiveness in Hindu Society.
A trap was laid by a team of Rakshas when Hanuman was going towards Himalayas to ensure that the mission of Hanuman ji failed. We now know that there were flying machines available as Shri Ram came back to Ayodhya using one such machine. Hanuman ji was using one such machine while moving towards Himalayas. Now please answer where would the Rakshas wait to trap Hanuman? The answer is obvious. Since such machines were limited, the refueling station where the machine could be refueled was the place where the trap was laid. They were absolutely certain that Hanuman ji had to come over there. Hanuman ji landed there, had the machine refueled and was informed by a well-wisher about the trap. During the subsequent fight, Hanuman ji barely managed to escape along with his machine. Perhaps he also damaged his machine. So he asked Bharat at Ayodhya for help. We know that by the time Hanuman ji reached Ayodhya, he fainted. Since fortunately, the injuries were minor he recovered immediately. Bharat gave him his own machine for transporting him to Lanka. We can now fully understand why Hanuman ji is called GYANI. Ramayan becomes more credible as we shed the illogical use of SUPERNATURAL or MIRACULOUS powers.
We also now know the meaning of Indra Rath used by Shri Ram. It may be noted that while Shri Ram was not allowed to use the skilled army of Kingdoms, Shri Ram was entitled to use the arsenal and machines to carry them in war. Indra Rath was the latest such machine, perhaps an armored vehicle. Since the vehicle also contained a skilled driver, this exception was made in fight against Ravan.
Golden Deer, as per information available today, even a child would answer this; that it was a remote control mechanically, man made, deer.
Regarding Naagpaash; we know that even in war there are certain rules. By using a guided chemical weapon having a very limited potency to engulf maximum 2 persons Rakshas broke the rule. The effect of that chemical gas was that it would slowly suffocate the persons affected. The rule was broken. Hanuman immediately understood this. He knew Shri Ram and Vaanars were not even authorized to use (during war) sophisticated air bone medical service available with some kingdoms although assessable to them on demand. The name of the service was Garurda. But since the rule was broken by Rakshas by using chemical weapon, Hanuman immediately called for it.