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Article analysis:

The article is generally reliable and trustworthy, as it provides a comprehensive overview of functional error handling in Flutter apps. The author has provided clear explanations of concepts such as functional programming, parsing a number, Either type, comparing Either and Result types, and using the tryCatch factory constructor. The article also includes links to relevant sources for further reading.

However, there are some potential biases that should be noted. For example, the author does not explore any counterarguments or alternative approaches to error handling in Flutter apps. Additionally, while the article does provide links to relevant sources for further reading, it does not provide any evidence or citations to support its claims. Furthermore, there is no discussion of possible risks associated with using either type or tryCatch factory constructors in Flutter apps. Finally, while the article does provide an overview of functional programming concepts such as map and reduce operators on Iterable sorts like list and streams, it does not present both sides equally; instead it focuses solely on how these concepts can be used in Flutter applications.