Final answer:
The speaker in the poem 'The Seven Ages of Man' has observed the life cycle of people.
Step-by-step explanation:
The most obvious conclusion that one can make about the speaker's beliefs expressed in the poem "The Seven Ages of Man" is that he has observed the life cycle of people. This can be inferred from the speaker's detailed descriptions of each stage of life. The speaker explores the different phases of life and reflects on the universal nature of this journey.
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