Takdhib: Contradicting the honorable Qu’ran or what was undoubtedly related from the Prophet and known by every Muslim scholar, like negating the resurrection of the bodies and souls, or negating the obligation of prayer, fasting, or Zakah. 

Ta^til: Negating or denying the existence of Allah. This type is the most blasphemous. Likewise is denying any of Allah’s Thirteen Attributes. 

Blasphemers are of two types. One is the original blasphemer. The other one is the apostate (murtadd). 

The original blasphemer is the one who was born to two blasphemous parents and reached pubescence on a blasphemous belief.  

The apostate (murtadd) is the person who was Muslim, then committed one of the types of blasphemy (riddah).