Political activist Tamrin Abdul Ghaffar has been egging on former prime minister Dr Mahathir Mohamad and the latter's successor Muhyiddin Yassin for a debate showdown, but neither is likely to entertain the idea.

For Mahathir, the Langkawi MP does not see any likelihood that Muhyiddin will accept the challenge, according to the former prime minister's political secretary Abu Bakar Yahya...