1º_ Science that studies facts and ideas confronting the true with the false and concatenating verifiable reasoning. From Greek 955; 959; 947; 953; 954; 951; (Logike), a feminine form since 955; 959; 947; 959; 962; ( logos "study, treatise, knowledge" ) - 953; 954; 951; (-ike), female 953; 954; 959; 962; ( -ikos "relative to" ) . 2º_ It is also the kind of coherent reasoning that logical science uses. 3º_ Feminine of logic ("relative to logic") .