> it was obviously not used "to show that you liked" to somebody else the content of his/hers message Specificly, according to the pictures, the “thumb up sign

> it was obviously not used "to show that you liked" to somebody else the content of his/hers message Specificly, according to the pictures, the “thumb up sign” by General Magic was designed as a decoration for an own creation (a clip-art kind) not as a signal “that you liked” what somebody else wrote or done. So the association with the more recent use of the symbol for the Facebook use case is unsupported.