The neuron’s threshold and its all-or-none signaling results in almost matches being treated equally downstream in the brain. The Almost Gate lets many inputs over its barrier. Henceforth they are treated the same.
Thought trains, sequences of thoughts, are crucial features in how we determine mentally handle our changing environment in satisfying our needs, our desires, and our goals. We think in relatively short chains of thoughts, some connected by logic and some connected by similarity.