The prediction is a conditional causal claim: if DOGE were used to radically simplify the U.S. tax code (e.g., implement a flat tax and drastically shrink the code), then U.S. real GDP growth would rise by about 1–2 percentage points and create a sustained expansion.

As of 30 November 2025:

• The U.S. federal tax code has not been overhauled using DOGE (Dogecoin) as any central mechanism, nor has Congress adopted a DOGE-based reform or flat tax tied to DOGE.
• The IRS and U.S. Treasury do not use DOGE as an official tax payment mechanism or as a structural tool for rewriting/simplifying the tax code; crypto usage for taxes remains limited to certain states/municipalities for payment, and is not structurally DOGE-centric or code-shrinking in the manner described.
• There has been no major legislative tax reform in 2024–2025 that meets the described condition of “using DOGE to shrink the tax code and create a flat tax.”

Because the triggering condition of the prediction has not occurred, we have no empirical basis to evaluate whether such a DOGE-driven tax-code simplification would in fact add 100–200 basis points to U.S. real GDP growth. It’s a counterfactual policy claim that remains untested, not a time-bound forecast whose outcome we can observe.

Therefore the correct classification is "ambiguous": the claim cannot be determined true or false given current reality, not because it’s too early, but because the scenario it depends on never happened.