This statement suggests a reflection by the Pope on the relationship between "doctrine" and "science," potentially viewing them as similar or related concepts. To elaborate on this connection, it's important to define both terms and explore how they might be seen as synonymous.

Here's an outline of how to approach this topic:

• Define Doctrine: Doctrine refers to a set of beliefs or principles held and taught by a particular group, especially in the context of religion 1 2 3. In the Catholic Church, doctrines are the official teachings that guide the faithful.
• Define Science: Science is a systematic and organized body of knowledge based on observation, experimentation, and inference. It seeks to explain the natural world through empirical evidence.
• Similarities: Both doctrine and science can be seen as systems of knowledge. Doctrine provides a framework for understanding spiritual and moral truths, while science offers a framework for understanding the physical world 4. Both rely on a method of inquiry, whether through theological reflection or empirical investigation.
• Theological Reflection: The Church has a long tradition of integrating faith and reason 5 4. This means that theological reflection can incorporate insights from various fields, including science, to develop a more comprehensive understanding of reality 6.
• Dialogue: The Church recognizes the importance of dialogue with the world, including the scientific community 7. This dialogue involves listening, understanding, and seeking common ground 8 9. It acknowledges that both faith and reason can contribute to the search for truth 4.
• Catholic Social Teaching: Catholic Social Teaching (CST) draws upon human reason, including insights from philosophy, economics, ecology, the sciences, and politics, and synthesizes them with the teachings of faith and theology to address social issues 2 3 6 10.
• Evangelization: Dialogue is also a path of evangelization. The Church needs to be present in dialogue with states, society, cultures, sciences, and other believers to promote human development and pursue the common good 7.
• Interreligious Dialogue: Inter-religious dialogue forms part of the Church's evangelizing mission and is a way of making Christ known 11 12. This dialogue requires respect, friendship, and service 13 14.
• Ecumenical Dialogue: Ecumenical dialogue involves an exchange of gifts, where each participant gains a truer knowledge and more just appreciation of its dialogue partner 15 16.
• Caution: It is important to avoid religious relativism and indifferentism in dialogue, while still offering the joyful witness of Christian hope 17.
• Common Good: The Church's social teaching emphasizes the obligation of every individual to contribute to the good of society, in the interests of justice and in pursuit of the "option for the poor" 18. This fosters human fulfillment for everyone 18.
• Human Dignity: The Church's social teaching rests on the concept of the dignity of the person and the promotion of justice and the service of the common good 19 20 21 22.
• Moral Principles: The Church sets forth moral principles in her social doctrine to form consciences and strengthen the spiritual and civil foundations of society 23.
• Faith and Reason: Faith frees and saves reason from error and endows it with manifold knowledge 4. Those who unite the study of philosophy with obedience to the Christian faith are philosophizing in the best possible way 4.
• Progress: The Church welcomes progress that augments science and public prosperity but emphasizes that this progress must be harmonized with the authority of the Church 5.
• Socialism: The Church has warned against the errors of socialism and the dangers it poses to temporal possessions, morality, and religion 1.

In summary, the Pope's reflection on doctrine as a synonym for science suggests a view of both as structured systems of knowledge that, while different in their methods and focus, can inform and enrich each other in the pursuit of truth and the promotion of human well-being.