"ascert" is probably misspelled. Trying assert instead Definition of assert
1
[ verb ] state categorically

Synonyms

maintain asseverate

2
[ verb ] to declare or affirm solemnly and formally as true

Examples

"Before God I swear I am innocent"

3
[ verb ] insist on having one's opinions and rights recognized

Synonyms

put_forward

Examples

"Women should assert themselves more!"

4
[ verb ] assert to be true

Synonyms

insist

Examples

"The letter asserts a free society"

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