At a glance
N1 が N1 なら、N2 も N2 だ means "N1 is bad, and N2 is no better." It criticizes two related people or groups as equally bad.
N1 が N1 なら、N2 も N2 だ。
親が親なら、子も子だ。 The parents are hopeless, and the kids are no better.
How to form it
| Part | Attaches to | Example |
|---|---|---|
| N1 が N1 なら | The same noun twice | 親が親なら |
| N2 も N2 だ | A second noun, related to N1, twice | 子も子だ |
| Variant: N1 も N1 なら | も instead of が, same meaning | 親も親なら、子も子だ |
| Polite ending | です instead of だ | 子も子です |
Register: a critical, somewhat exasperated comment. It is usually said about other people, not to them.