精神 せいしん薄弱 はくじゃく しゃでしょう
seishinwa kujakushadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 精神薄弱者

1. Likely mentally weak; Probably has a mental deficiency; Possibly mentally vulnerable

Polite
Presumptive
Conjecture