Quote:
Originally Posted by GaijinInvasion
No it's not. 'desu' is the polite expression for state of being. The past tense of 'desu' is 'deshita'.
'da' is considered to be informal, because it's 'stronger'. If you use 'da' at the end of a phrase you declare that it IS that way, which is considered to be more informal.
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This man speaks the truth.
Casual, past form of Desu