I do believe in a "sixth sense", but I am referring to intuition. This has nothing to do with assumption... which could be seen as synonyms in some circles. I believe that in order to develop intuition, you have to learn to trust your feelings. I've had several experiences in my life which have lead to my intuition being strengthened. Trigger Warning
1. I dated a girl who struggled from mental illness. I didn't know at the time I started dating her, but I still decided to stay with her (once I found out) for some time. A couple months into our relationship, she started having really irregular mood swings... and she would become extremely violent, and shortly after depressed. One day in particular, we got in an argument as I was getting ready to leave her place to head out for work. around 14:30 I had a strange feeling come over me almost instantly and felt I needed to call her immediately. My phone was dead so I borrowed a friends'. When she picked up, she was violently screaming at me almost inaudibly, with the occasional "fuck you" in there, lol. I told my boss I had to leave work to go tend to an emergency, and when I arrived, she was passed out from an intentional overdose on sleeping pills, and beer. She swallowed 30 pills.
2. (Same Girl) I had a friend drop me off at her place following a beach bash on base. I asked her if she wanted to come but she said no because she couldn't bring her dog. When I got in, she immediately started scolding me for not inviting her. The argument wasn't particularly that bad though, it maybe lasted ten minutes, and then she was over it. I thought nothing of it, and went upstairs to lay down as she finished getting ready for bed. Being that I was drunk, I hadn't noticed that I passed out for a couple of hours. I woke up slightly and saw her putting on make-up, wearing a white dress. She was in the master bathroom. I remember thinking, "i'm not going out tonight... I was at the beach all day... I don't know what she's doing." I remember as she left the bathroom, I saw her pop a pill in her mouth and down it with a swig of water from a bottle... I thought it was weird but thought I was over reacting (This was 4 months after her first attempt.) Fifteen minutes after tossing and turning, I knew I had to check on her, and when I did, she was standing on a chair with the rope slung over the door, and wrapped around the opposite facing doorknob. She had taken one of the Ativan prescribed to her after her previous attempt to calm her down so that she could attempt the second time. She didn't recognize I was there until I had already removed the rope and had her in my arms as I carried her to the couch. I called 911, and after the ambulance picked her up, I left. Twice was enough.
Trust your six sense.