Here's the context:
This assumes that when a pair particle-antiparticle is created, a bias towards antiparticles being captured and particles escaping must exist.
Otherwise, the mass of the black hole might fluctuate, but in average for big numbers of pairs, equal percentage of particles and antiparticles would be captured/escape.
So, is there really a bias needed for the black hole to loose mass, or is it something wrong about my understanding of Hawking radiation?
What is a bias in this context? Could you give me examples of expressions using the word 'bias'? My interpretation of this text is that a particle or an anti-particle do some sort of wrong action towards each other that should not be acceptable, but that doesn't make much sense because they are not persons nor they have capacity to judge. So what am I missing?