complementary regimes

background / foreground
long run / short run
male / female
local / global
time / space
topology / algebra
existence / uniqueness
gls / mls
technical language / ordinary language
meta level / object level
organizational units / manifesting units
comedy / tragedy
mind / body
Mathematics / Language Arts
keywords: life, General Systems Theory, reciprocity

double negative being negative

A case parallel to the situation of a double negative being negative is that a straight line that intersects both the negative portion of both the horizontal and vertical axes has negative slope.
keywords: Mathematics, Geometry, the coordinate plane

two positives giving a negative: three cases

Besides the Morgenbesser retort, and the concept of ‘friendly fire’ (‘fire’ being a positive in the military context), there is the fact that a line (in the coordinate plane) that intersects the positive portion of both the horizontal and vertical axes has negative slope.
keywords: Mathematics, Geometry, the coordinate plane

OBSERVATION

Your lifestyle is no more sustainable than your literary effort is sustained. (cf: “Publish or perish.”)
keywords: life, General Systems Theory