What is the U.S. policy of ‘strategic ambiguity’ towards Taiwan?

President Joe Biden’s declaration that the United States would defend Taiwan if China invaded has renewed talk of whether Washington’s longstanding policy of "strategic ambiguity" on this thorny…

Source : https://japantoday.com/category/features/opinions/what-is-the-us-policy-of-%27strategic-ambiguity%27-towards-taiwan