Meaning of the word "as far as one can tell" in English

What does "as far as one can tell" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

as far as one can tell

US /æz fɑr æz wʌn kæn tɛl/
UK /æz fɑːr æz wʌn kæn tɛl/

Idiom

based on the information available or what one can observe

Example:
As far as I can tell, everything is going according to plan.
He seems honest, as far as I can tell.