And before you answer the above question as Popper himself no doubt would have:
I would strongly advise the philosopher answering the question about the scientific method to define exactly what they mean by the word "truth" before attempting to explain exactly what "falsifiability" means. Otherwise, we are discussing undefined terms, and I take a dim view of philosophy as an area of learning and a discipline because of that very issue.
Truth is a value, not an absolute, even in math. I have explained this in another thread. I will define it once again here:
We value the math that allows us to divide ten apples between five friends or customers because it has survival value. But it fails to capture the whole truth about such a transaction. If I tell you that six of the ten apples have large unappetizing worms inside of them, and that one of the apples is poison, how does this change your reckoning? Because your math did not capture the whole truth, the numbers and the operation you did with them only contained a partial truth value, not the whole truth that is needed.
Everything that is referred to as "truth" in nature is just like that example; good for some purposes, and bad or false for others. Everything you know, or think you know as truth is just like this, with only one exception I can think of.
And "falsifiability", like "truth" is also a value, not an absolute. A scientific theory may only contain some truth, not all of it, just as a system of mathematical reasoning, as Gödel pointed out, is either inconsistent or incomplete, and the only theorem that is ever both complete and consistent in this universe is identified as Gödel's incompleteness theorem alone. That's because it handles both issues by means of a reduced scope of definition. It has no need of defining complete, incomplete, consistent, or inconsistent in order to be true, nor to test any other theorem in any other system of reasoning in order to be certain of its conclusion. Is it falsifiable? Oh, yes, you can believe it is that, unconditionally.
A glass that is half empty was filled before it was emptied
A glass that is half full was empty before it was filled
Either you will learn more and more about less and less (specialist), or
you will learn less and less about more and more (generalis), until
You will either know everthing about almost nothing, or
You will know almost nothing about everything.
This summarizes all I ever wanted to know about philosophy for my entire life, and no philosophy course or philosopher ever covered any of it.
Useless, isn't it?