Hiya again, smile

Thank you for your great explanation. The one point I am trying to ask about is this from your post.

'' Clear to me means something like a window which is clear because it doesn't block the passage of light. And light is any light that we can see, it can have any color. ''

You say the dark is just the absence of light, is dark not a state behind the light?

Is dark not like a window to light and allows the light from my light bulb to pass through it which then when lit allows me to see through the dark?