No ifs and buts is an idiomatic expression that often means there is no room for negotiation or excuse. However, there are many synonyms that writers may use to convey a similar message. For example, the phrase "without exception" indicates that no exemptions or degree of variation is allowed. Other options include "unequivocally," "decidedly," "absolutely," or "definitely." These words all suggest that there is no doubt or hesitation. Writers may also use "unconditionally" to indicate that no terms or conditions are agreed upon. Whether one chooses to use "no ifs and buts," or any of its synonyms, the goal is to leave readers with the impression that there is no room for debate.