How did Sqealer manipulate the language of the Fourth Commandment?

One resolution has been changed to: “No animal shall sleep in a bed with sheets” (79). At this point, Squealer approaches and denies that there was ever a rule against beds—only sheets. As usual, he justifies the pigs’ actions by threatening Mr. Jones’s return. Soon after, the pigs award themselves the additional privilege of waking up an hour late.