# Linear Classifier Probes - [Understanding Intermediate Layers Using Linear Classifier Probes](https://arxiv.org/abs/1610.01644) - Black box - monitor the [Features](Features.md) at every layer of a model and measure how suitable they are for classification - "Probes" - trained entirely independently of the model - observe experimentally that the linear separability of [Features](Features.md) increase monotonically along the depth of the model