solipsism

The philosophical idea that only one's own mind is sure to exist; extreme self-centeredness.

• solipsist/ˈsɒlɪpsɪst/(n)唯我论者
• solipsistic/ˌsɒlɪpˈsɪstɪk/(adj)唯我论的

• philosophical solipsism
• solipsistic worldview
• cultural solipsism
• intellectual solipsism

1. 1.Social media can encourage a kind of solipsism where only one's own experience seems real. (extreme self-focus)
2. 2.The philosopher argued that solipsism, while logically irrefutable, is psychologically impossible to sustain. (only the self exists)

• egocentrism/ˌiːɡəʊˈsɛntrɪzəm/— self-centeredness
• narcissism/ˈnɑːsɪsɪzəm/— excessive self-love
• navel-gazing/ˈneɪvəlˌɡeɪzɪŋ/— excessive self-absorption, informal

from Latin "solus" (alone) + "ipse" (self) — the self alone — only the self is real