### Daily GMAT Concept #28: The Boundary Value Check in GMAT Inequalities

Whenever a GMAT Data Sufficiency inequality question restricts variables to integers, check extreme boundaries (like $x = 0$, $x = -1$, or $x = 1$). A statement that seems sufficient for positive ranges often fails when tested at boundary boundaries.

**Actionable Drill:** When practicing your next 5 logic questions, apply this concept deliberately. Track the difference in your problem-solving velocity.