A condition can be both necessary and sufficient. It is both necessary and sufficient. Note that these conditions are only sufficient, not necessary. This criterion is both necessary and sufficient. The following sufficient (but not necessary) condition is often useful. Causes can be distinguished as necessary, sufficient or probabilistic conditions. Haplodiploidy is neither necessary nor sufficient for eusociality. Moral virtue is both necessary and sufficient for eudaimonia. Treatment with drugs is neither necessary nor possible. It is suggested they help provide structural support for other necessary cytokinesis processes. The team will make most of the necessary decisions. Congress also has implied powers derived from the Constitution's Necessary and Proper Clause. This is due to the difficulty of obtaining the necessary parts for repair. The work was due to problems in raising the necessary funds. India was deemed to be the country capable of growing the necessary amounts.