At the start of the letter, what are the two feminist tools that serve as a premise for feminist thought in the book, Dear Ijeawele, or A Feminist Manifesto in Fifteen Suggestions?

The first tool is "I matter," and that this sentiment applies to both genders. Both genders matter equally. The second is the idea that if one idea applies to a woman, then it needs to apply to a man as well. Adichie provides the example, if a man sleeps with another woman, and you forgive him, would the same be true if you slept with another man? This implies that there can be no double standards.