Even after noise filtration techniques are applied and continuously re-calibrated to distill signals from the vast external data, constructing a graph for a set of users or an individual is immensely challenging.
“Society exists only as a mental concept; in the real world there are only individuals.” ~ Oscar Wilde
Personalised Choices is the Holy Grail. The graph needs to consider each person as an individual.
taste graphNot as a segment.
Not as a class.
Not as a commodity.
It needs to respect his/her individuality, which introduces an unparalleled level of complexity where traditional analytical methods such as collaborative filtering fails, as it always tried to club people into segments / clusters.