Jean Baudrillard argues in his book Simulacra and Simulation that in postmodern culture, our society has become so reliant on models and maps that we have lost touch with reality. He asserts that reality now imitates the models and maps that precede it, so that the map determines the territory rather than the other way around. Simulacra are copies of things that either had no original or whose original no longer exists, and simulation involves imitating the functioning of real-world processes over time through the use of models.

2. Jean Baudrillard- Simulacrum and simulation
Simulacra and Simulation is a 1981 philosophical treatise by
Jean Baudrillard, in which he pursues to examine the
relationships among reality, symbols, and society. what has
happened in postmodern culture that our society has become
so reliant on models and maps that we have lost all contact
with the real world that preceded the map. Reality itself has
begun merely to imitate the model, which now precedes and
determines the real world: "The territory no longer precedes
the map, nor does it survive it. It is nevertheless the map that
precedes the territory precession of simulacra that engenders
the territory“. Simulacra are copies that depict things that
either had no original to begin with, or that no longer have
an original. Simulation is the imitation of the operation of a
real-world process or system over time.

3. Simulacrum- is a person or thing. The word was first recorded in the English language
in the late 16th century, used to describe a representation, such as a statue or a
painting, especially of a god. By the late 19th century, it had gathered a secondary
association of inferiority: an image without the substance or qualities of the original.
Philosopher Fredric Jameson offers photorealism as an example of artistic
simulacrum, where a painting is sometimes created by copying a photograph that is
itself a copy of the real.
Simulation- is the imitation of the operation of a real-world process or system over
time. The act of simulating something first requires that a model be developed; this
model represents the key characteristics or behaviors/functions of the selected
physical or abstract system or process.