To be fair, they address exactly that point in the first few sentences.
If somebody completes a version of software, are they not allowed to announce future versions? Is scientific understanding not allowed to advance and change? Such views of science, as fixed and unchanging, with rigid definitions of inherently fuzzy concepts, are inherently anti-science.
We all need to be able to live with the notion of levels of completeness. This is biology—not engineering.
What is the precise definition of a filled glass of water?