Linear Separability
A property of a dataset: two classes are linearly separable if you can draw a straight line (in 2D) or a flat hyperplane (in higher dimensions) that perfectly separates all examples of one class from all examples of the other.
A property of a dataset: two classes are linearly separable if you can draw a straight line (in 2D) or a flat hyperplane (in higher dimensions) that perfectly separates all examples of one class from all examples of the other. The Perceptron can only learn linearly separable problems.