Final answer:
Lincoln's Reconstruction plan did not technically "readmit" Southern states to the Union because it did not require significant changes to their laws or civil rights for freed slaves.
Step-by-step explanation:
Lincoln's Reconstruction plan did not technically "readmit" Southern states to the Union because, according to his plan, a state could be readmitted once 10% of its voting population had taken an oath of allegiance to the Union and established a new government that abolished slavery. This plan did not require Southern states to change their laws, provide civil rights for freed slaves, or allow African Americans to vote. Therefore, many argue that Lincoln's plan was more lenient and did not fully address the challenges of Reconstruction.
Learn more about Lincoln's Reconstruction plan and its limitations