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<p>from Utrecht Lexicon of Linguistics</p> <p><b>New page</b></p><div>&#039;&#039;&#039;Atom Condition&#039;&#039;&#039; is a condition on word formation rules proposed in Williams (1981) which says that:<br /> <br /> *&#039;&#039;the attachment of afx to Y can only be restricted by features realized on Y.&#039;&#039;<br /> <br /> ===Examples===<br /> English has a class of [[latinate affix]]es that can only attach to latinate roots. A clear example is the nominalizing [[suffix]] &#039;&#039;-ion&#039;&#039;. This [[suffix]] shows all kinds of [[allomorphy]], and the choice of the allomorph depends on the choice of the root (&#039;&#039;deduce:deduc-tion&#039;&#039;, &#039;&#039;compose:compos-ition&#039;&#039;). On the assumption that &#039;&#039;deduce&#039;&#039; and &#039;&#039;compose&#039;&#039; are formed by prefixing &#039;&#039;de-&#039;&#039; to the root &#039;&#039;duce&#039;&#039;, and &#039;&#039;con-&#039;&#039; to &#039;&#039;pose&#039;&#039;, Siegel predicts by her [[Adjacency Condition]] that the suffixation rule for &#039;&#039;-ion&#039;&#039; will not be sensitive to idiosyncratic features of the embedded roots. But other prefixed forms with the same [[root]]s (&#039;&#039;reduction&#039;&#039;, &#039;&#039;production&#039;&#039;, &#039;&#039;deposition&#039;&#039;, &#039;&#039;proposition&#039;&#039;) show incontrovertibly that it is the root which determines the allomorphy, even after prefixation. To account for this, Williams assumes that roots such as &#039;&#039;duce en pose&#039;&#039; function as the head in prefixed words such as &#039;&#039;deduce&#039;&#039; and &#039;&#039;compose&#039;&#039;. Given the further assumption that any feature marked on the head of a construction will percolate up to the node that dominates that construction, the prefixed forms &#039;&#039;deduce&#039;&#039; and &#039;&#039;compose&#039;&#039; will inherit the properties of their [[head]]s. By replacing the [[Adjacency Condition]] with his Atom Condition, Williams is able to account for the fact the affixation rule which attaches &#039;&#039;-ion&#039;&#039; can (indirectly) refer to the root features. <br /> <br /> ===Comment===<br /> This condition is intended to replace Siegel&#039;s (1977) [[Adjacency Condition]], and to explain a class of systematic exceptions to its predecessor. <br /> <br /> ===Link===<br /> [http://www2.let.uu.nl/UiL-OTS/Lexicon/zoek.pl?lemma=Atom+Condition&amp;lemmacode=1048 Utrecht Lexicon of Linguistics] <br /> <br /> <br /> {{dc}}<br /> [[Category:Morphology]]</div>

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