verb (used with object), inferred, inferring. 1. to derive by reasoning; conclude or judge from premises or evidence: They inferred his displeasure from his cool tone of voice. 2. (of facts, circumstances, statements, etc.) to indicate or involve as a conclusion; lead to. 3. to guess; speculate; surmise.
The modern recorded history of sign language began in the 17th century in Spain, in part with Bonet. In 1620, Juan Pablo Bonet published ReducciÃ³n de las letras y arte para enseÃ±ar a hablar a los mudos (Summary of the letters and the art of teaching speech to the mute) in Madrid. Considered the first modern treatise of the phonetics of sign language and the use of sign language to teach speech to the deaf, this book depicted Bonet's form of a manual alphabet. His intent was to further the oral and manual education of deaf people in Spain.
It was long ago that early man used gestures to express himself. He was the first to use sign language. In 1620 Juan Pablo de Bonet was the one to write a book which had the first alphabet system known to man. He used different signs through hand shapes to represent different sounds of speech.hough it came after Bonetâs book but still it was the main cause for the development of deaf schools. In 1771 Abbe Charles Michel de LâEpee found the first school for the deaf in Paris and through the standard sign language created by him, he used to teach them.