Recent comments in /f/MachineLearning

gamerx88 t1_j3fx20a wrote

I am very impressed by the underlying GPT3.5 LLM and the capabilities that alignment via RLHF has unlocked in LLM, but I don't believe any serious NLP researchers or practitioners think that NLP is solved.

There are still tonnes of challenges and limitations that needs to be solved before this tech is ready. E.g The very convincing hallucinations, failure on simple math problems, and second order reasoning tasks amongst others. And many other areas that remains unresolved in NLP as well.

Having been in the NLP field for close to 10 years and having experienced several other developments and paradigm shifts in the past (RNN/LSTM, Attention, Transformer Models, LLMs with emergent capabilities) , I am more optimistic than fearful of this development's impact on our job.

Each of these past developments made obsolete certain expertise, but also expanded the problem space that NLP can tackle. The net effect however has been consistently positive with the amount of money and demand for NLP expertise increasing.

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TeamRocketsSecretary t1_j3fmzxw wrote

Fusion of LLM and vision models is something I’m noticing more work on. Also, embodied feedback with human in the loop, especially towards robotics applications. The vision field def seems to be co-opting language models and there is research on making inference with them faster (recurrent-transformers) and bringing back recurrence into the transformer which is interesting since transformers succeeded them naturally once the power of attention came to light.

Also a lot of work to be done on using them for mission critical applications (healthcare) as well as “robustifying” them (transformers using raw byte sequences showing much more robustness to noise.)

So I guess a lot of the native NLP tasks that LLM were made for are being used more for non-NLP tasks, especially now in reinforcement learning.

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AlmightySnoo t1_j3fa93g wrote

Excerpt from pages 8 and 9:

>Unfortunately, the formal infinite-width limit, n -> ∞, leads to a poor model of deep neural networks: not only is infinite width an unphysical property for a network to possess, but the resulting trained distribution also leads to a mismatch between theoretical description and practical observation for networks of more than one layer. In particular, it’s empirically known that the distribution over such trained networks does depend on the properties of the learning algorithm used to train them. Additionally, we will show in detail that such infinite-width networks cannot learn representations of their inputs: for any input x, its transformations in the hidden layers will remain unchanged from initialization, leading to random representations and thus severely restricting the class of functions that such networks are capable of learning. Since nontrivial representation learning is an empirically demonstrated essential property of multilayer networks, this really underscores the breakdown of the correspondence between theory and reality in this strict infinite-width limit.
>
>From the theoretical perspective, the problem with this limit is the washing out
of the fine details at each neuron due to the consideration of an infinite number of incoming signals. In particular, such an infinite accumulation completely eliminates the subtle correlations between neurons that get amplified over the course of training for representation learning.

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