There are many problems with duality.

1. We humans think associatively, or we think one thought at a time, followed by the next, and so on. Thus, the illusion of multitasking, for example.

2. Taking Number 1 as a given, then we see the world through this lens of duality. And herein lies the rub. How can we beings leap beyond dualistic thinking, coming from the set of the lens?

3, Meditation and other spiritual practices create the neutral observer which allows a glimpse beyond the dualistic lens.

Having studied philosophy and logic there are a myriad number of examples of our playfulness with duality with the frame of forms of the dualistic perceptual lens.