What underlying technology governed the responses of both ELIZA and PARRY?

Answer

If-then logic and string manipulation

Both ELIZA and PARRY were fundamentally constrained by the technology available at the time, relying heavily on rule-based programming. Their responses were triggered when the system recognized a specific phrase structure or keyword in the input. If the structure matched a predefined condition, the system would execute the corresponding stored response pattern—a classic if-then logic sequence coupled with basic string processing, rather than utilizing modern semantic understanding or complex algorithmic prediction.

What underlying technology governed the responses of both ELIZA and PARRY?
inventionchatbotrecommendation system