Fallibilism vs. Cynicism
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With an account, you can revise, criticize, and comment on ideas.Our ideas can be 100% true in the sense of absolute truth. It’s possible to come up with true ideas. There’s no criterion of truth to tell that they’re true, but they can still be true.
I think you run into the problem of definitions. An idea cannot be absolute, perfect truth without total, perfect, complete definitions for its terms. This isn't required for knowledge - the terms can be rough because the ideas are tentative. But for absolute truth, the boundaries of meaning of your terms must be completely determined. But, as the postmoderns pointed out, this requires infinite information - the complete determination of any one term requires its distinction from all other terms. In fact, they didn't go far enough. I'd argue you would need to know the distinction between the term and all other possible terms.
You have to know perfect definitions in order to have the idea in your head be perfectly true. Perfect definitions require infinite information, therefore you cannot know perfect truth.
… for absolute truth, the boundaries of meaning of your terms must be completely determined.
You seem to be using ‘absolute truth’ differently than others. Wikipedia:
Absolute truth is a statement that is true at all times and in all places. It is something that is always true no matter what the circumstances. It is a fact that cannot be changed. For example, there are no round squares.
This is what I think Popper had in mind. Also that absolute truth leaves no room for deviation (which I think is the reason it’s “true at all times and in all places”). Nothing related to definitions or meanings. Popper wasn’t very interested in definitions.