I see both sides in everything. What would one call this type of thinking?
how about this word: bilateral thinking?
When something is bilateral it has two sides or it affects both sides of something. Discussions between two political parties are called bilateral because both sides get to share their views.
Bilateral comes from Latin: bi means "two" and lateralis means "belonging to the side." Debates about issues can be described as bilateral — as long as people on both sides get to speak. However, bilateral can describe anything with two sides, like some of the organs in the body: the brain, heart and lungs all have two distinct sides.
Harvard Business Review
According to HBR (Harvard Business Review) titled "Business Design: Becoming a Bilateral Thinker: A Case Study" by Heather Fraser, the emerging discipline of Business Design requires a particular combination of mindsets, methods and thinking skills that exercise the 'whole brain' and help develop a well-rounded capacity for agile thinking and adaptive doing. She explains how a combination of the right mindset (being) and a rigorous methodology (doing) unlock a person's thinking and describes six skills under each of the three headings (being/doing/thinking) that foster bilateral thinking and create a platform for enterprise success.
If you strictly just want both sides of each spectrum (for example: positive vs negative; white vs black), this word will fit perfectly.
Oxford Online Dictionary
1.Having or relating to two sides; affecting both sides. For example: ‘Examine his nose for any obstruction, such as polyps or septal deviation, and whether unilateral or bilateral.’
2.Involving two parties, especially countries.(this is what is commonly used). Example: ‘the bilateral agreements with Japan’
Notes: If we can have bilateral agreement on countries, how about we promote bilateral thinking in terms of everything?
There are several suggestions here that could help you, and that revolve more around the idea of critical thinking.
Seeing both sides of an argument or issue is great--as long as there are only two sides!