What is Subjective:
Subjective is said of a perception, opinion or argument that corresponds to a subject's own way of thinking. It is also said of everything that is relative to the subject in distinction from the rest of the world.
The word subjective derives from Latin subiectīvus, which means "it depends on something else." Thus, it is presumed that the subjective is centered on the subject. In this way it contrasts with the notion of objective, in which the point of view is centered on the object.
Hence, sometimes the word subjective is used to detract from a comment or opinion. For example: "What you say is very subjective."
Subjective is an adjective that does not refer to an object itself, but to a person's perception of it, which he expresses through language. The conclusion is relative, that is, it is affected by the context of the interpreter and the universe of his interests.
Seen this way, when talking about something subjective, reference is made to an opinion that cannot be applied universally, since the thing / reality analyzed is susceptible to various interpretations.
However, it should not be concluded that the plural or relative character of subjectivity invalidates the content of subjective statements. On the contrary, the subjective has been validated as a necessary instance of the development of one's own thinking and a previous step for social agreements that favor coexistence.
Differences between subjective and objective
If the word subjective refers to what is proper to the observing subject, objective refers to what is proper to the object, regardless of the opinion of the observer.
In this way, a statement is objective when it is not subject to individual interpretation but refers to the recognizable features of an object in itself, capable of being observed, measured or verified.
For example, a certain mountain can be large or small depending on the subject's references. "The Bolívar peak is huge." Huge for what and for whom? It is a personal perception.
An objective information would be to determine the specific height of the mountain with specialized instruments. For example, "The Bolívar peak in Venezuela has a height of 5007 meters above sea level." This "objective" data allows the peak to be located on a scale of similar referents, although it does not invalidate the perception of the subject in the example.
Subjective in philosophy
In the theory of knowledge developed by Inmanuel Kant in the 18th century, the subjective corresponds to the subjectivity. Subjectivity is understood as the ability of a subject to perceive, judge, argue and communicate a certain thought through language.
Certainly, this thought is formulated from the variables of the subject's context and according to their interests. This, however, does not invalidate critical judgment. On the contrary, in philosophy subjectivity is the locus of self-consciousness. Subjective thinking does not deny controversy; requires it.