Hard Problem

Hard problem may refer to:

  • Hard problems in computational complexity theory
  • The hard problem of consciousness: explaining why we have qualitative phenomenal experiences

Famous quotes containing the words hard and/or problem:

    “Our bread need not ever be sour or hard to digest. What Nature is to the mind she is also to the body. As she feeds my imagination, she will feed my body; for what she says she means, and is ready to do. She is not simply beautiful to the poet’s eye. Not only the rainbow and sunset are beautiful, but to be fed and clothed, sheltered and warmed aright, are equally beautiful and inspiring. There is not necessarily any gross and ugly fact which may not be eradicated from the life of man.”
    —Henry David Thoreau (1817–1862)

    “The problem of induction is not a problem of demonstration but a problem of defining the difference between valid and invalid
    predictions.”
    —Nelson Goodman (1906)