Fiction, Imagination and Reality.

Phenomenology - Beliefnet:

A child at about 6 or 7 begins to sort out the imaginary and fiction from the real quite naturally. Herm imaginary friend is identified as different from herm real friends. Santa and the tooth fairy are identified as myth (fiction) that may be fun to learn from and play with but are clearly not reality. This process is normally encouraged by care providers as normal progress in learning. It can be subverted by establishing some myths as reality, usually for social conditioning and safety. In a religious community the God myth is strongly promoted as reality, and obedience intentionality toward God as a real 'supercop' is encouraged.

The last chance a child has to reallocate myths to the fiction category is the post pubescent rebellion when the child 'leaves his parents' and 'cleaves' to a new society historically by exogamy, but a recent development (by evolutionary standards) is the leaving home for apprenticeship or scholarship. The myths of the parents are challenged and compared to the myths of the new society and assigned to the appropriate fiction/real categories.

Again this process can be subverted by religious prohibitions to leaving the 'presence of God' for any reason, and a strong endogamy bias.