In our beliefs, we are fundamentally dependent on what others tell us (climate change, viruses, elections, economy, pensions, AI). Instead of checking information ourselves, we often trust or mistrust information and its sources. Trust as well as mistrust can be justified or unjustified. It is part of a reasonable (or unreasonable) practice. Disinformation, for example, undertakes to exploit such practices. But even when unwarranted mistrust in, say, scientific research arises for other reasons, the question is how to respond and how to improve the practice of trust and distrust.