Are all of these sentences grammatically correct?
a. "That man claims he talks to angels."
b. "That man claims he talks to the angels."
c. "That man claims he talks to ghosts of the dead."
d. "That man claims he talks to the ghosts of the dead."
Does 'the' change anything ?
Do b and d mean that he claims that he talks to all angels/all of the ghosts of the dead?
Could a and c be used if he claims that he talks to all angels/all of the ghosts of the dead?