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These books are intended for learners of the core foundational skills in Philosophy and Java. Here, you can find books that help you study the core foundational skills of philosophy or Java — completely free and open-source.

  • Math

    Mathematics is the human tool for describing, understanding and revealing the laws of nature in an abstract and logical way, and the language for expressing these laws.

  • Logic

    Logic is the foundation of philosophical exploration, used in core branches of philosophy such as logic, epistemology, and metaphysics.

  • Writing

    Writing can use critical thinking to clearly and persuasively convey complex philosophical ideas. while quickly enhancing reading skills to identify logical errors in articles.

  • English

    English is the core language of modern philosophy, with almost all philosophical works preserved in English.