ascertain from

ascertain from

To find out something from examining or observing something or some situation. A noun can be used between "ascertain" and "from." I ascertained a lot about my daughter's new boyfriend from our first dinner together. What were you able to ascertain from the article?

ascertain something from someone or something

to find out or learn with certainty information from someone or something. I need to ascertain some facts from you. A few facts have been ascertained from the interview.
References in classic literature ?
Your probity," replied the stranger, "is so well known to the prefect that he wishes as a magistrate to ascertain from you some particulars connected with the public safety, to ascertain which I am deputed to see you.
As far as I can ascertain from various works, this seems to hold good throughout the Pacific, and even in the large islands of the Sandwich archipelago.
It would pay you very well indeed if you would ascertain from any of your mates at the Waldorf when and with whom the lady in question left that hotel.
According to a travel advisory issued by the ministry all Indian citizens travelling to China have been advised that before making any travel arrangements, they should ascertain from the Chinese Embassy whether their visas will be affixed to their passport or they will be stapled paper visas.
All Indian citizens intending to travel to the People's Republic of China are advised that before making any travel arrangements they should first ascertain from the Chinese Embassy or Consulate, as the case may be, whether the visa being issued to them will be affixed to the passport or will be in the nature of a stapled paper visa, so that they are not inconvenienced or put to any financial loss later on this count," the MEA advisory stated.
The 1994 yellow book says working papers must be sufficient to enable an experienced auditor with no previous connection with an audit to ascertain from them the evidence supporting the auditor's significant conclusions and judgments.