Sweet taste is felt earlier than the
witter taste, why.
->

Because our taste receptors recognise sweet taste faster than bitter taste.

because the taste receptors for tasting sweetness are at the tip of your tongue while the receptors for tasting bitterness are at the back of the tongue

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .