Do you think "Imaginary" things are phiscaly and scientifically true?

I think so because what we think is actually a set of brain signals. Adults say Imaginary things are wrong but they phiscally exist. But, it's how you define "Phiscally". Stories aren't true all the time and we don't have magic or houses in stories in our earth. However, it's like a computer signals that uses only ones and zeroes. They don't exatly say the th word but machines decode it quickly what do you think about this question?