The thing that P-realist supposed in really real existing out there independent of the human mind is actually a merely speculated-thought in their head, thus illusory.
What is Philosophical Realism [P-realist];
For the P-realists, there is always a REALITY-GAP between what is perceived and their supposed mind-independent object out there.1. Philosophical Realism is .. about a certain kind of thing .. is the thesis that this kind of thing has mind-independent existence, i.e. that it is not just a mere appearance in the eye of the beholder.
2. This includes a number of positions within epistemology and metaphysics which express that a given thing instead exists independently of knowledge, thought, or understanding.
3. [Philosophical] Realism can also be a view about the properties of reality in general, holding that reality exists independent of the mind, as opposed to non-realist views which question the certainty of anything beyond one's own mind.
4. Philosophers who profess [Philosophical] realism often claim that truth consists in a correspondence between cognitive representations and reality.
5. [Philosophical] Realists tend to believe that whatever we believe now is only an approximation of reality but that the accuracy and fullness of understanding can be improved.
6. In some contexts, [Philosophical] realism is contrasted with [Philosophical] idealism. Today it is more usually contrasted with anti-realism, for example in the philosophy of science.
https://en.wikipedia.org/wiki/Philosophical_realism
As such, a P-realist will NEVER EVER know his supposed 'real' mind-independent object out there
What is the Reality-GAP? [time-gap]
The REALITY-GAP [time-gap] can be represented by the blue-arrow above.
To a philosophical Realist [P-realist] the REAL candle in the picture exist as a mind-independent object from the human.
In this case, the REAL candle is separated from the person, as such there is no way the person will ever realize and know what the REAL candle really is.
As such there is a REALITY-GAP [like the blue-arrow] for the person, i.e. between the real-candle and the person.
What the person know as the candle is merely an inferred reality from his experiences.
There is NO WAY the person will EVER know what the supposed real independent candle is.
This is amplified by the perception of our Sun.
It takes about 9 minute for the light to reach the human person on Earth.
As such, no P-realist on Earth will ever know what is the real-Sun really is.
What the P-realists realize is merely the 9-minute old Sun and never the really-real independent Sun.
The Reality-Gap should be more obvious for the P-realist.
Note
Is the Star, Proxima Centauri Real?
viewtopic.php?t=40154
P-realists can perceive an independent Proxima Centauri in the sky which they suppose is really real, but in real time, the supposed real Proxima Centauri could have died and disappear.
As such re P-realism. there is always a REALITY-GAP or time-GAP between the person and what is supposed to be real, existing independent of the human mind out there.
This REALITY-GAP [time] gap can be in terms of the minutest nano-millimeters in term of distance or nano-seconds in term of time.
Because of the Reality-Gap, the P-realist can never know and realize the real mind-independent thing out there.
What a P-realist 'knows' have is merely a thought-object and not the real thing.
This is why the P-realist is also an Empirical-Idealist, the only empirical thing he can reallyt know is within his mind.
Therefore philosophical realism is never realistic.
So, what the P-realist supposed as 'REALITY' is merely an illusion.
Views?