Official rule text
91.2 To resolve the primary ability on the “Technology” strategy card, the active player can research one technology of their 93.1 Trade goods and commodities are represented choice. Then, they may research one additional technology of by opposite sides of the same token. their choice by spending six resources.
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Source: Twilight Imperium: Fourth Edition - Living Rules Reference: Prophecy of Kings
Expansion: Prophecy of Kings
Version: 2.0
Reference: Rule 91.2