This article rethinks the dynamics of collective contention by emphasizing the role of tactical ambiguity. In the face of high political uncertainty, contentious mobilizations work best when they avoid explicit claim-making and engage instead in what I call equivocal challenges—i.e. provocative actions whose meaning will be defined by the response they elicit from specific targets. I provide detailed illustrative support for this argument through a study of the 1948 Bogotazo, by analyzing network data and repertoires of action extracted from archival sources. I conclude that rushed claim-making in contexts of political uncertainty may very well be a losing tactic and that conversely collective equivocation has significant political payoffs.
