1 + 1 = 3

The title of this post is true. I'm not making jokes about very large values of 1, I'm pointing out that people sometimes seem to forget a non-mathematical principle concerning combinations and aggregations. Specifically:

The whole is greater than the sum of its parts.

A game console is more than a price, a marketing team, a controller, a set of games, a TV, and a few hours to burn. You can't extract the attributes of one, compare them to another, and mathematically define which is intrinsically better. Attributes are not a homogenous group, they will interact with each other. Controllers interact with graphical power, prices interact with the aestetic look of the system, and games interact with the ease of use. Failing to realize the interconnectedness can lead to the updated principle:

The whole is rarely the exact sum of its parts, but is often less or greater.

It's the same reason a well written script, a dedicated staff, a great director, awesome actors etc. can somehow fail to make a great movie, while a group of lesser quality with the right synergy can make epics.

In whatever you do that involves combination or aggregation, remember this.