'external phenomenon' is a correct and usable term in written English.
Generally, it is used when referring to events or phenomena that are outside of the physical or mental experience of an individual. For example, "The external phenomenon of climate change is causing severe damage to our environment."
In cases in which an experience is taken to reflect some real phenomenon in the world, descriptions of the experience are often ambiguous between an external phenomenon (The rose is red) and an inner one (The mental image is red).
For it seemed to him not merely an external phenomenon, having to do with an actual absence of light, but rather as though it emanated from within him, as if he had finally crossed the threshold of his own absence of hope.
Each way of counting the external phenomenon corresponds to the manner of its conception.
2. For Frege, the external phenomenon is conceptualized via a sortal term (e.g., via "copse" or "tree"), which provides an associated unit.
"Here a life-course stands as an external phenomenon from which understanding seeks to discover what produced it within a particular environment.
To explain this idea, Frege noted that one and the same external phenomenon can be counted in different ways; for example, a certain external phenomenon could be counted as one army, 5 divisions, 25 regiments, 120 companies, 400 platoons, or 4000 people.
For the great poet of external phenomena was now living a life of the mind, absorbed in his own delusions.
Emerson acknowledged understanding derived from observation of external phenomena, but believed that the more important truths are eternal and intuitive, emerging from within.
He begins to realize that we are only chemical compositions and that external phenomena have no reality except in the consciousness of the observer.
According to Zhou, the sage, or superior man, reacts to external phenomena according to the principles of propriety, humanity, righteousness, wisdom, faithfulness, and tranquillity.
Moreover, the representations in the various subsystems would arguably have to stand in the kinds of relation to external phenomena proposed by the externalist theories of intentionality mentioned above.
