Existence refers to whether or not a thing exists. It is the basic question of being: is this real, or is it only imagined. A tree exists. A fossil exists. A planet exists. But other claims are harder. Does a soul and divine realm exist? Does consciousness exist? Is it only brain activity? Something more?
In traditional philosophy, existence is often contrasted with essence. Existence asks whether something is. Essence asks what something is. For many classical thinkers, essence was central because things like a soul were thought to have a nature, form, and identity. Later existential thinkers reversed the emphasis, especially for human beings. In that view, existence comes first, and essence is shaped through life, choice, action, and meaning.
In TST Philosophy, existence is used carefully. At least in this life, existence does precede essence: we are born into species-level biological structure, but individual identity forms over time through impressions, memory, culture, and choice. TST can identify an existence claim without pretending to define its ultimate nature. Some people believe a soul exists. Some believe consciousness is more than brain activity. Some believe personal existence is created only in this life and ends with the body. TST does not take a final position on speculative claims that exceed public evidence.
This places existence inside the TST metaphysical split. In the material world, existence asks if something is real. In the mind, existence is an idea about whether something exists or not. When a thing exists in the material world and is confirmed, it maps to an empirical idea. When the claim goes beyond public evidence, it is speculative and categorized as irrational. This is how you calibrate belief and hold humility.
