The meaning of this sentence is to refer to the fact that people's thoughts are influenced by manipulating information at their convenience.
In this sentence it can be inferred that the actor means that he is influencing people's thinking so that they change their thoughts on a particular topic.
There are many methods to influence a person's thinking. One of them is to manipulate the information so that it serves the objectives set by the speaker.
For example, in some cases fear of something unknown is spread so that people think that it will bring them something bad and they decide on another possibility.
Learn more about manipulation in: https://brainly.com/question/14435293
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