How do I answer to a question asking “Is the purpose of the trigger system to sincronize the signal acquisition with the input”?"

I'm aware you can get triggers from other sources and that in general the trigger syncronizes the acquisition with a trigger event. But as for its purpose, is it always to sync the acquisition with the input?

• the purpose of a trigger is just a time reference to synchronize, the capture with the triggger event. Repeating triggers may be synchronous to the past or not – Tony Stewart Sunnyskyguy EE75 Jun 24 '18 at 22:02
• did you write that question? ... should it not say "Is the purpose of the trigger system to syncronize the signal acquisition with the signal?" – jsotola Jun 24 '18 at 22:07