The pseudo-passive (låta sig)

When evaluating technical constraints, use the pseudo-passive construction låta sig to express feasibility—whether something "can be done" or "allows itself to be modified."

The "låta sig" construction

Combine the verb låta (to let/allow) with the reflexive pronoun sig (itself) and an infinitive verb. Often, this infinitive takes the passive -s ending.

This structure can be modified.
Den här strukturen låter sig modifieras.
The database can be implemented without problems.
Databasen låter sig implementeras utan problem.

Expressing constraints with "inte"

To state that something cannot be done, place inte immediately after låter sig.

The blueprint cannot be modified.
Ritningen låter sig inte modifieras.
The algorithm cannot be integrated.
Algoritmen låter sig inte integreras.

Active vs. passive infinitives

While the final verb often takes the passive -s form (such as göras), you can also use a standard active infinitive. The passive meaning is provided entirely by låta sig.

It can be done.
Det låter sig göras.
The algorithm cannot be implemented in this system.
Algoritmen låter sig inte implementera i det här systemet.

You will often see låta sig used in longer sentences to evaluate technical integrations:

The module seems compatible, but it cannot be integrated.
Modulen verkar kompatibel, men den låter sig inte integreras.