Why chatbots as a learning example?

So far, we have built an application for every NLP topic that we have seen:

• Text cleaning using grammar and vocabulary insights
• Linguistics (and statistical parsers), to mine questions from text
• Entity recognition for information extraction
• Supervised text classification using both machine learning and deep learning
• Text similarity using text-based vectors such as GloVe/word2vec

We will now combine all of them into a much more complicated setup and write our own chatbot from scratch. But, before you build anything from scratch, you should ask why.

Why build a chatbot?

A related questions is why should we build our own chatbots? Why can't I use FB/MSFT/some other cloud service?

Perhaps...