is

Check if antecedent ⇒ consequent (a ⇒ b).

boolean.xor(a, b, ...)

const boolean = require('extra-boolean');

boolean.imply(false, false);
// true

boolean.imply(false, true);
// true

boolean.imply(true, true);
// true

boolean.imply(true, false);
// false

References

• Boolean operators: QBasic 1.1
• Imp operator: Microsoft Docs
• IMPLY gate
• Material conditional