i strongly believe that BTC cgminer for GPU will be dead in a matter of weeks.
Thus, all the efforts now for cgminer development should be in the direction of LTC (scrypt)

be·lieve
[bih-leev], be·lieved, be·liev·ing.
verb (used without object)
1.
to have confidence in the truth, the existence, or the reliability of something, although
without absolute proof that one is right in doing so.
Your dictionary is wrong. Belief does not imply either evidence or lack thereof.