Can we testify that a man is a believer if he regularly attends prayers in the mosque?

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Check below answers in case you are looking for other related questions:
Status of the Hadeeth “If you see a man frequently coming to the mosque, then bear witness that he is a believer”
Can a person who has a cold or a cough be prevented from attending prayers in congregation for fear of harm and infection?

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Status of the Hadeeth “If you see a man frequently coming to the mosque, then bear witness that he is a believer”
Can a person who has a cold or a cough be prevented from attending prayers in congregation for fear of harm and infection?

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