Linkage between reality and perception

I am trying to make sense of this statement:

So in common parlance reality still means reality, but includes the assumption that perception is an accurate indicator of reality, a known falsehood and actually conceded by everyone.

What does it mean to say, "reality still means reality"? How can 'reality' be a 'known falsehood'? What exactly is 'conceded by everyone'? What do you think this sentence really means?

Note that this is a question about grammar, not philosophy.

Solution 1:

The author is saying that we have to assume, for the sake of daily life, that the reality we perceive is in fact reality. We could be living in a simulation, and the world could very well be a dream, but if you go around assuming that whenever something happens it may not actually happen it makes life difficult for everyone. If someone goes around making the statement that the world may not be real thinking he is an insightful philosopher, no one would take them seriously. We all know that the world may not be the real world and that perception isn't a perfect system (hence known falsehood) but unless we get together and work in our world nothing could be accomplished.

Solution 2:

It's a little opaque, but let's break down the phrases.

reality still means reality

In the minds of most individuals, their perception of reality is indeed reality.

the assumption that perception is an accurate indicator of reality

Consider the first optical illusion of the Wikipedia entry, namely that of the checker shadow.

Your perception is that square A and B are different shades of gray, but this is not reality. They are in fact the same shade (although you may have to download the image and sample A and B with an image editor to convince yourself.)

The author is saying that the assumption that our perceptions are correct is

a known falsehood

(Note that it is the assumption that our perceptions are correct that is a known falsehood, not the OP's interpretation that reality is a known falsehood.)

Our assumptions are incorrect because our perceptions can be fooled, as in the cited optical illusion.

The author asserts that the knowledge of this falsehood is

actually conceded by everyone.

(I disagree that everyone concedes this falsehood. Many children or those from other cultures would trust their eyes and their perceptions and may not perceive an illusion. Please read more at Müller-Lyer illusion, especially at "natives of the Australian Murray Island were less susceptible to the Müller-Lyer illusion.")