The phenomenological reduction [epoché]
is a suspension of judgments about the existence or non-existence of the external world to focus on phenomena themselves.
The eidetic reduction
is an analysis of essence or ideals,
It is performed by cycling through different elements of a mental reproduction for a given phenomenon to define its key characteristics.
The transcendental reduction
is a general examination and dissection of experience derived from the mind which is supplied by the given sensate intuitions, acknowledging its taken for grantedness.
This, the reduction proper, is the realization of and acceptance
that the world as we know it is taken for granted; everything is a signifier.
Signifiers represent patterns, we use them to recognize;
We signify existence, one pattern at a time.
From the philosophy of Edmund Husserl (1859–1938),
German philosopher and founder of phenomenology.