Write a precis of the passage given below in about one-third of its length. Please do not give any title to it.The precis should be written in your own language. 

The properties of encapsulation and inaccessibility refer to the flow of information between modules. Encapsulated systems cannot access information stored in other modules: they can only refer to information contained in the input, and to module-internal information. Thus, a phonological module encapsulated with respect to, say, syntax, should not be able to access syntax-internal facts about linguistic objects.Similarly phonology-internal information is not necessarily accessible to other modules, as evidenced by the frequently cited principle of ‘phonologyfree syntax’.

It must be noted that encapsulation is not necessarily absolute, in that a module can be encapsulated with respect to some modules but not to others .For instance, it is reasonably clear that speech perception is encapsulated with respect to, say, conscious beliefs (i.e. it is not possible to consciously perceive a [t] as a [w]). On the other hand, speech perception can be influenced by input from modules other than hearing, as in the case of sign languages or of the McGurk effect, although this could simply be a sign that the perception mechanism is multimodal in nature and not restricted to the aural mode of transmission.

Thus, a modular phonology should operate without reference to information available in other modules. A modular view of phonology is incompatible with approaches that seek the proximate causes of phonological behaviour in extraphonological domains, such as ease of perception: for instance, it should not be possible to say that ‘non-peripheral vowels tend to be disallowed in unstressed positions [a statement about a phonological phenomenon] because they are more difficult to perceive than peripheral vowels [a statement about the perceptual system]’. It is, of course, highly plausible that such factors play a role in synchronic systems by shaping them over time: they can be ultimate causes – but not proximate ones.