last night i did not wake up to switch off the alarm after 17 min. or maybe i did but i do not remember. i was very tired last night from working a lot and doing my experiment with sleeping less. i woke up in the morning around 8 o'clock after about 6 hours.
when i woke up i was kind of more rested. i think that the reason for it is that i have reached a deeper state of sleep. but still during the day i had light sensation of tiredness in my head. though it is gone later afternoon.
later in the evening i made a short 17 min sleep. 