Augustus
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Based on the evidence in the world, most people who study the Quran don't consciously know that they've acquired this mindset, it's tacit.
That isn't really what tacit knowledge is though. You seem to be talking about a subconscious attitude that develops via repeated exposure to an explicit message (is this correct?).
Tacit knowledge is the part of knowledge which is not easy to put into words even if you are aware of it and are trying to encode it. It develops as a result of experience in complex tasks/environments. For example, you can easily recognise your friend's voice, but you couldn't explain why you recognise it as it involves a range of subconscious processes and judgements. Or a craftsman can make an exact replica of a Stradivarius violin, yet it not sound the same as he lacks the tacit knowledge that Stradivarius possessed that differentiated his instruments from other near identical ones.
Anything that can be clearly expressed in a few words is not tacit knowledge even if it is held subconsciously.
Less sure about this, but AFAIK, perceptual learning also is not about a general preference for X over Y that may change suddenly based on exposure to new information, but a fundamental shift in the way you perceive part of your environment.
Learning from perception is different from perceptual learning. If someone has been brought up by a somewhat racist parent, exposed to countless racist messages and thus has a negative attitude towards minorities, this is often not going to be perceptual learning as it could, in theory, be undone by a single incident (let's say a black person saved their life) or at least a few incidents. Like how tacit knowledge can't be easily verbalised, perceptual learning can't easily be unlearned (except through repeated exposure to undo the neural programming)
On the other hand, a person who was subject to severe bullying and abuse by people of a particular ethnicity may develop an instinctive negative response to people of this ethnicity that cannot simply be undone as it has become a strongly learned response, which would be perceptual learning.
But through high repetition (which creates a perceptual learning environment), the person will gain the orientation to despise non-Muslims.
It's not really as simple as that either.
Repeated exposure to a message has a high correlation with recall, but not necessarily with attitude change. For example, if you get a fanatical Trump hater, merely exposing them to Trump messages is unlikely to change their opinion.
Attitude prior to exposure to a message plays a significant role in how you react to it. Exposure to messages that match your attitudes may indeed strengthen them. Exposure to messages on issues you lack an opinion on, particularly when you are not very knowledgeable about them so messages cannot be corrected or contextualised might relate to attitude change also (but not necessarily). On those that contradict prior attitudes they generally must contain a reason for you to doubt your original position and those which don't may even strengthen your initial perception.