Dreams can link to actual sensations, such as the incorporation of environmental sounds into dreams such as hearing a phone ringing in a dream while it is ringing in reality, or dreaming of
urination while
wetting the bed. Except in the case of lucid dreaming, people dream without being aware that they are doing so.
Some philosophers have concluded that what we think as the "real world" could be or is an illusion (an idea known as the
skeptical hypothesis about
ontology). The first recorded mention of the idea was by
Zhuangzi, and was also discussed in
Hinduism;
Buddhism makes extensive use of the argument in its writings.
[49] It was formally introduced to western philosophy by
Descartes in the 17th century in his
Meditations on First Philosophy.
Ever wish that you would just "wake up"?