Seems like a pretty crazy claim, want to share your reasoning?
No ideology = no characteristic thinking.
If you think you don't have ideology, you probably have the dominant one. Or don't think.
Just because A -> B, and we have B, doesn't mean we can conclude A.
Sure,
Idealogy -> a manner of thinking characteristic of an individual, group, or culture
A manner of thinking characteristic of an individual -> idealogy
Like, the "definition" of car is 'a vehicle moving on wheels', but we can't from that conclude that all vehicles moving on wheels are cars.
For instance, from https://www.dictionary.com/browse/ideology, "the body of doctrine, myth, belief, etc., that guides an individual (...)"