scathing

witheringly scornful; severely critical.

What is the meaning add up?

intransitive verb.?

1a : to come to the expected total?

the bill doesn't add up.?

b : to form an intelligible pattern :?

make sense her story just doesn't add up.?

educated guess

a guess based on knowledge and experience and therefore likely to be correct.

"a prognosis can necessarily be only an educated guess"

evangelist

a person who seeks to convert others to the Christian faith, especially by public preaching.

"an American television evangelist"

shellac

informal

North American

defeat or beat (someone) decisively.

"they were shellacked in the 1982 election"

What is the focus group?

A focus group is a research method that brings together a small group of people to answer questions in a moderated setting. The group is chosen due to predefined demographic traits, and the questions are designed to shed light on a topic of interest. Focus groups are a type of qualitative research.

swipe

an attack or criticism.

"he took a swipe at his critics"

retool

adapt or alter (someone or something) to make them more useful or suitable.

"he likes to retool the old stories to make them relevant for today's kids"

What happened at Saigon??

The phrase 'the fall of Saigon' refers to the takeover of the city by the Viet Cong two years later on 30 April 1975. It became a symbol of the war's futility. The US was forced to abandon its embassy in the city and evacuate more than 7,000 US citizens and South Vietnamese by helicopter.