Do we really exist? In mathematics(geometry) Every solid object is made up of 3 or more plane figures Every plane figure is made up of 3 or more lines and every line is made up of two or more points! Now when we define point...it is an arbitrary place that represent the presence of something at some area....but when we go deep down 0.000000000000000000000000001 could be a point! again in chemistry every thing has an atom in it, and every atom is made up of 3 particles, and again every particle is made up of gulons, photons and subatomic particles....which have arbitrarily zero mass and occupy nothing! in physics there are two colors and the rest are created by our mind! in biology every creature sees different color for the same thing! are we living under illusion or in reality?