[It’s] important to understand what a scientific theory is.
Outside science, people often use the word “theory” to refer to a hunch or unsupported personal opinion. This is not what the word means in science.
In science, a theory refers specifically to a well-substantiated explanation which accounts for a body of well-substantiated facts.
So, whenever we encounter a statement like “evolution is just a theory – not a fact”, this tells us that whoever’s made the statement is not using the terms correctly.
In science, theories don’t get promoted to facts; facts are explained by theories. Because of their explanatory power, theories are the ultimate goal and the ultimate achievement in the sciences of nature.
If you don’t even understand this, then there’s no point talking to you.