How do u tell if a source is credible or truthful

How do you imagine life would be without the invention of the typewriter? would computers have been invented?

Why did reconstruction polices split the women’s suffer age movement?

From the soviet point of view, which reagan policy most threatened to create a new arms race? a. strategic defense initiative b. u. s. support for israel c. aid to the anti-soviet rebels in afghanistan d. iran-contra scandal