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.
American Sign Language was invented for the same reason that all languages are invented, for communication. It is mainly for communication among people that are Deaf, hard of â¦ hearing or sometimes people that are mute.1 person found this useful.reek Sign Language came about when American Sign Language and  French Sign Language joined. This occurred in the 1950s. It became  the legal form of deaf language in Greece â¦ in 2000.