You said per the below
We are not saved by works but if we are truly saved we will have Godly works. So anyone claiming to be saved but has no Godly works it is acceptable to believe that person isn't truly saved.
No one truly saved can refuse giving their Testimony, giving of themselves to Godly purposes, sharing Jesus to others, feeding the hungry, clothing the needy, helping the widow.
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If you are able to reject any or all of those Godly works then it's acceptable to believe you are not saved.
But you are saying and claiming that it’s acceptable to believe they are not saved.