When a person prays alone today, should he say “and say Amen” in Oseh Shalom?

This source-based Torah study examines: When a person prays alone today, should he say “and say Amen” in Oseh Shalom? It follows the canonical Hebrew discussion through the parasha and classical Jewish sources. This localized discovery layer is a concise summary rather than a full translation of the article; practical, halakhic, medical, legal, historical, mystical or empirical claims remain source-framed and subject to the canonical review status.