We observe molecular hydrogen gas 
using 21-cm emission.
Definitions:
Preferences
The subjective tastes and desires of individuals or groups, influencing their choices among various goods, services, or outcomes.
Framing
The way information is presented to influence decision-making and judgment.
Simplifying Assumptions
Basic conditions that modelers set to make complex economic analyses more manageable and understandable.
Rationality
The quality of being based on or in accordance with reason or logic; often involves making decisions that are optimal based on available information.
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