Implicit models are characterized by:
Answer options
A
Providing closed-form p(x)
B
Direct sampling without explicit probability
C
Always having tractable likelihoods
D
Using Gaussian mixtures only
Correct answer: Direct sampling without explicit probability
Explanation
Quick AnswerThe correct answer is Direct sampling without explicit probability because it directly addresses the core logic of Generative AI.
Implicit generative models (like GANs) generate samples directly without defining an explicit probability density function, making likelihood evaluation difficult.