Cunning leads to knavery. It is but a step from one to the other, and that very slippery. Only lying makes the difference; add that to cunning, and it is knavery. ↗
The only place that the left hasn't placed the blame is on their agenda, so some advice for our friends on that side of the aisle: that's where you've gotta look because that's what got you into this mess. ↗
If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing. ↗