different between assumptions vs preconditions

assumptions

assumptions From the web:

• what assumptions underlie macbeth's fears
• what assumptions underlay the tribute system
• what assumptions are made when conducting a t-test
• what assumptions are used to determine sustainability
• what assumptions need to be made about this population
• what assumptions cause the immediate-short-run aggregate
• what assumptions is he making about adults
• what assumptions about the surgery profession

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preconditions

preconditions From the web:

• what preconditions are necessary for democracy to work
• what are preconditions and postconditions in java
• what are preconditions in test cases
• what are preconditions for devising a solution to a problem
• what are preconditions in a use case
• what are preconditions for an audit
• what are preconditions in java
• what does preconditions mean