To dream that you are thinking logically means that you are finding things being logical and the solution for them to solve has to be logic one. Sometimes these dreams are explained as being very bright ones and it shows that your mind and your body still has lots of energy even during the sleep.
Dream dictionary: Logic dream meanings
…(Compilation | Encyclopedia | Qur’anic commentaries | Manual | Journal | Papers | Rare book | Source book) Reading any reference book, Qur’anic commentaries, or compilation of the prophetic sayings in a dream means correcting one’s actions and thoughts and walking on the straight path. Reading the studies of religious scholars or science books in a dream means acquiring knowledge and benefiting from it. Reading history books or journals in a dream means becoming close to people in the government. Reading a book on logic, rhetorics or explicative apposition in a dream means working in an amazing field of science and discoveries….