[Advaita-l] Gayatri?

[Bhaskar YR]

Further even in the ancient times some discretions were also permitted as 
otherwise how could Sayakama, being a low-born have learnt the Vedas.

praNAms 
Hare Krishna

With this can we say satyakAma-jAbali episode has been written in 
upanishad in this kaliyuga after the real occurrence of the same?? 
Likewise, can we assume bruhadAraNyaka has been written after the personal 
dialogue between yAgnAvalkya & maitreyi??  Just curious to know how can 
these seeming real life incidences have taken entry in apaurusheya veda-s 
& vedanta-s.

Hari Hari Hari Bol!!!
bhaskar