A scientist claims that by means of astronomical calculations, he has determined the day when Qiyaamah will take place.

Answer

The scientist suffers from the malady of hallucination. Perhaps he is given to some kind of substance abuse – perhaps dagga. If the scientist is a 'Muslim', then he will lose his Imaan with his baatil claim. The Qur'aan Majeed emphatically negates the findings of his calculation. The Qur'aan Hakeem states unambiguously that only Allah Ta'ala is aware of the Hour.