No it is not.
Perception requires interpretation of a reaction to produce some form of meaning.
A reaction on its own has no meaning. It can induce other reactions, but they too will have no meaning.
How reactions can be interpreted into meaning is still a mystery in material science.
There are many reactions going on inside your brain, but what is it that perceives these reactions and interprets them into a conscious awareness of meaning? Observance of physical brain activity shows many reactions going on, but at no point in these chains of physical reactions can there be anything other than more induced reactions. The end result is just another reaction - not perception.
You're being silly again, Alan.
You're trying to manufacture an artificial separation between, say, a reaction to a visual perception and any subsequent intellectual reaction, in the form of mental processing, about this visual perception.
So, assuming you were correct, you're in effect saying that we have to deliberately prompt ourselves to start thinking about what we'd just perceived visually and that if we forgot to do that then we wouldn't intellectually start to process what the visual stimuli might mean. For instance, if we saw a flashing blue light in our rear-view mirror we'd have no understanding of what that light might mean until we consciously decided to think about it - and that is nonsense. Next time to see something of note when driving try deciding not to think about it (which is, of course, thinking about not thinking about it) until you consciously decide to start thinking about it and let us know how you get on.
Whether you like it or not, Alan, the intellectual consideration of incoming stimuli is just a reactive biological process: just as well too, since not remembering to start to think about why a police car with it's blue light flashing might be interested in us does soon like a recipe for problems.