How can science be used to defeat Logical Fallacies and misleading Rhetoric?

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

this happened on tam airlines.

a 50-something year old white woman arrived at her seat and saw that the passenger next to her was a black man.

visibly furious, she called the air hostess.”what’s the problem, ma? ” the hostess asked her

“can’t you see? ” the lady said – “i was given a seat next to a black man. i can’t seat here next to him. you have to change my seat”

– “, calm down, ma” – said the hostess

“unfortunately, all the seats are occupied, but i’m still going to check if we have any.”

the hostess left and returned some minutes later.

“madam, as i told you, there isn’t any empty seat in this class- economy class.

but i spoke to the captain and he confirmed that there isn’t any empty seats in the economy class. we only have seats in the first class.”

and before the woman said anything, the hostess continued

“look, it is unusual for our company to allow a passenger from the economy class change to the first class.

however, given the circumstances, the commandant thinks that it would be a scandal to make a passenger travel sat next to an unpleasant person.”

and turning to the black man, the hostess said:

“which means, sir, if you would be so nice to pack your handbag, we have reserved you a seat in the first class…”

and all the passengers nearby, who were shocked to see the scene started applauding, some standing on their feet.”

explanation:

recognizing subtle discrimination means understanding unconscious bias. many times, unconscious bias motivates subtle discrimination against coworkers, bosses, and clients, which in turn can become illegal negative employment action. sometimes, people are unaware of the fact that they are discriminating.