Verse 1.14

स्वप्ननिद्रायुतावाद्यौ प्राज्ञस्त्वस्वप्ननिद्रया ।
न निद्रां नैव च स्वप्नं तुर्ये पश्यन्ति निश्चिताः ॥ १४ ॥

svapnanidrāyutāvādyau prājñastvasvapnanidrayā |
na nidrāṃ naiva ca svapnaṃ turye paśyanti niścitāḥ || 14 ||

It means “Viswa” the waker & “Taijasa” the dreamer they have swapna (dream) & nidra (sleep) i.e. they have ignorance and error!

‘prājñaḥ’ has only nidra ( the deep sleep or sleep blankness) without dream i.e. A sleep without a dream or “Ignorance without Error“! However,

“Turiya” the pure consciousness has niether sleep nor dream i.e. niether Ignorance nor Error!