Welcome to the 1520 Perfect Dictionary
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| Observability | |
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| OBSERVABILITY Definitions: i. In control theory, observability is a measure of how well internal states of a system can be inferred from knowledge of its external inputs. ii. The quality of being observable (capable of being or liable to be observed; noticeable; visible; discernible). ____________________________________ See perfect knowledge (5). See perfect measure (4). ___ See perfect notability (1). See perfect discernment (2). ___ See perfect VISIBILITY (3). | |
1520 Products |
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1520 Products was established in 2005 with the purpose of entertaining and teaching us on key and important aspects of life (such as marriage, sex, etc) through the playing of games which will allow us to laugh but at the same time pass a message of what is the right or ideal way. |
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 1520 Sex Game |
 1520 Puzzles |
 1520 Marriage Game |