I would summarize the previous blog post as follows:
In general, a closed system, which contains e.g. a physicist and/or computer, cannot predict its
own future, even if we assume deterministic laws of physics (*).
This is quite easy to understand once you think about it;
But is this some deep insight or just trivial stuff?
An equivalent statement would be that, in general, a closed system, which contains e.g. a physicist and/or computer, cannot
determine or know its own microstate.
Although equally trivial, it has a bit more 'statistical mechanics flavor' to it and might be interesting if one considers foundational
questions about entropy or even more profound quantities.
It also has a certain Zen-like quality...
(*) See also this and that.