The distinction between "it's" and "its" is a fundamental rule of punctuation. "It's" is a contraction for "it is" or "it has," while "its" indicates possession. Understanding this difference is straightforward, yet many continue to misuse these terms, leading to significant errors in writing. This mix-up is often regarded as one of the most notable blunders in punctuation and grammar.
Lynne Truss, in her book "Eats, Shoots & Leaves," emphasizes the...